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Learn to solve a system by substitution
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- เผยแพร่เมื่อ 8 พ.ย. 2012
- 👉Learn how to solve a system of equations by substitution. To solve a system of equations means to obtain a common values of the variables that makes the each of the equation in the system true. To solve a system of equations by substitution, we solve for one of the variables in one of the equations and then substitute for the variable in the other equation and then solve for the other variable. Next we plug in the obtained value of the other variable into the equation for the initial variable we solved for to obtain the value of the variable.
The value of the two variables obtained is the solution to the system of equations.
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Organized Videos:
✅Solve a System of Equations Algebraically
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Easy
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Hard
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Learn About
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Learn About
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✅Solve a System of Equations Using Elimination | Easy
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Medium
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Hard
• Solve a System of Equa...
✅Solve a System of Equations Word Problem
• Solve a System of Equa...
✅Solve a System of Equations With Three Variables
• Solve a System of Equa...
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#Systemofequations #Algebraically #brianmclogan
Did you ever imagine you’d be helping a 41yr old who is getting her teaching degree late in life? Your patience with those students astounds me; yes, third box... lol. You’re an angel, Sir! Thanks for staying focused and explaining math.
you got your degree?
@@Ivan-dj3pl yes, landed a teaching job soon after. Thanks again!
Did you end up getting your teaching degree and becoming a teacher?
@@thecurioussquirrelreviews nice!
Your channel help me a lot. It would be amazing to have a math teacher like you. Thank you sir.
you are very welcome!
Agreed
Your videos have helped me so much throughout my math class. I really appreciate how you take the time to explain things in simple terms (and why certain numbers and variables change) which makes them way easier to understand.
well happy to be able to help you out!
I have my quarterly exam tomorrow and I’m so thankful for this video. 😩 I don’t know what I’d do without this. I don’t wanna fail my math class but I’m not really good at it so I have to search for it to understand it better! Thank you for this.
same except it's finals for me
LEAVE THE COMMENTS AND GET BACK TO STUDYING
"2019 KIDS ONLY CARE ABOUT COMMENTS"
this is 2020 fools. Gamers unite to fight in WWIII. We can do this together with the power of math.
@@glarchy lol what about storm area 51 one all we need is the power of algebraic expressions
@@sasukeuchiha263 sorry bro already happened. You should know this after the unit about time.
hello 2020 pandemic
@@glarchy this is 2021 fool. Life is miserable.
Thank You Brian for this excellent lesson. I am a 45 year old grad student trying to get my teaching license and this was by far the best examples to solve these types of Alebra problems. I stayed focused and patient and feel more comfortable to solve these kinds of problems. Thank You again Sir.
As a mom of 4 doing virtual learning these videos have helped so much. Never stop doing what you do. Big thank you form my kids and myself.
Same here! He has helped me understand it easier than any teacher I have ever had!
Kid: And you plug it in and solve for Y?
Teacher: Exactly
Kid in the back: (clicks in his head) Ohhhhh
learning is a process
Brian McLogan lol
better then my own math teacher great
Thanks, this was really helpful for me to finish my homework. I was reviewing old material and I forgot how to do this, hehe.
you are very welcome!
Thanks
He didn’t call on me, I had a question
my bad, haha
🤣🤣🤣🤣🤣🤣🤣🤣🤣
Why aren't you my math teacher I would totally be a student in your class because you make it more good to explain!
Thank you very much sir for this helpful video.
I never knew these videos of teachers explaining the solutions were gonna be useful... But Mr. McLogan is just a lifesaver
you saved my algebra 1 grade thank u
Thank you Brian. I am studying for my ged(which i failed the 1st time by 6 points) and that was with no studying. But i have watched hours of your videos,and i really like your teaching techniques. You have helped tremendously so im confident now that i can pass this test. THANK YOU
Not only are you saving me in my math class (my teacher does not lecture, only gives assignments with due dates and we have to figure it out) so thank you for that but I also must comment on ypur patience with those kids. I know I would not have the patience to do what you do and answer all of the questions that are common sense questions but they are only kids and don't realize it. You are a great teacher not only to those kids in your class but also to all of us at home. Idk what I would do without your channel! Thank you!!!
Sir I am amazed on how easy you explained each step. Thank you
Thank you Mr.McLogan i cant understand how my teacher teaches me so i found your channel and it helps a lot i also have a test tomorrow wish me luck :)
Thanks Mr McDonald's 👍 😊
Lol
“Can I use the bathroom”
Used that one today
You are a great teacher.
thanks happy to be able to help
me: does an equation with a method higher than my level, thinking my teacher would be impressed
the teacher: NoOo yOu hAvE To dO ThE wAy i dId It!!!!!!!!1!!
btw you helped me with a exam ur a life saver :D
(In 4:00) does it matter where you place the Y? could you have put it first
I have a quiz tomorrow, so hopefully this helps me!
What do I do if there is no variable alone in any of the equations?
this saves me with 2 assignments due tom lol
you are the best teacher than my teacher
happy to be able to help
Your clear concise manner of teaching has helped me tremendously. You made me like math!
Im in highschool and some of my friends in china learned this in grade 4 but who cares as long as i understand your videos!
Simply multiply second equation by 2 , we get 4X - 2 Y= 18. Add fist equation to it. We get 3X+4X=7X and on other side 10+18=28. Hence 7X=28 and X=4. Hence work out Y as 3X+y=10. So 12+Y= 10 . Hence Y= - 1. pSD.
And I got lost... The great thing about this is that you can rewind the video whenever you want instead of asking the teacher to repeat it... over and over again... (They would probably get annoyed)
Thank you sooooo much Mr.McLogan! this video reeaallly helped me with my studying for my Algebra test tmr!
you are very welcome! happy to be able to help
if you were my actual teacher i would be passing math youve saved my life thank you
you are the best, thanks a lot
This is better than going to classes each and everyday but you don't understand. I never understood Substitution and for that i hated it so much because i always find it difficult to deal with but all thanks to Mr Brain, this video real helped me a lot. Now i understand Substitution and i like it. Can you please give more examples in-cases where by the coefficient is not 1 for instance 8x=7-3y and 9y=-20x+13
see the comment below. Happy to help
I'm a distance learner and algebra has gotten way harder since I can't ask as many questions as I used to so watching your videos are very helpful thx
thank you so much, I have no words to say thank you, you save me from an exam, I just refer your videos and faced it, you are a life saver, again thank you so much
You help me more than my math teacher-
We have a test in 2 days and she never taught us how to do it she just expects us to know.
Thanks 😘
thx it help me a lot your a great teacher!!!!!!
Thank you Mr.
I got a question what if you got a question with both unknown values is equal to 1.
Will the method of substitution works for this question as well?
5x+2y=29
x-y=-4
very helpful
You teach way better than my teacher
happy to help!
Teacher explaining something < videos explaining something
Thank you so much! I was really struggling with this, and now I understand :)
Sir I wish you were my math teacher those kids don’t appreciate you I’m here creating a lake of sweat for my quiz tomorrow and you help me understand. Thank you so much
American ways always like this simplifying both side. Just tell students if you move over side of equal side it will change the simple of side......that's all and shorter, easy understand. Thks
Saved my grade ty sir
you are very welcome!
You’re a lifesaver thank you!!
thank you that's great
thank you sir, now i can now understand "solving systems by substitution" very easy.
Love it
what school do you teach at?
dad your math skills are too good!!
just a lot of practice
Dad???
I’m In 8th grade and this helped me so much, thanks!
11th....I'm in Jamaica so😑😑
This really helped me a lot!!! Thank you for making this easier for me!!!
you are very welcome!
Very helpful!
Thank you God bless you
You are legendary
Thanks for the videos!
happy to help
I love the way you teach you are great at explaining and you are helping me so much I appreciate you so much thank you for these videos
You are so welcome!
I got it your math helper
what if there isnt a coefficent with 1 or -1??
Algebra regents in a few so nervous but this helped me ! Thanks :D
you are very welcome and best of luck Barbara!
Thank you Mr Brain, you are such a great teacher. I never understood substitution but now, jea i am almost there. This video was so helpful to me but most of the examples here are just with one coefficient. Can you please help do one example with coefficient more than one for example :8x=7-3y and 9y=-20x+13. Thank you
you are very welcome! here is a whole playlist of examples th-cam.com/play/PL0G-Nd0V5ZMr9vwB_4rGYne9YdfIULcxm.html
x=2 y=-3
"May I go to the bathroom" 😂😂😂
When lol
@@_tundra i think it was at the end😂😂
Thank you sir, it helps me a lot.🧡
hopefully this makes a difference on my test /: ty :)
You are a great teacher!
thank you, just happy to help
forever wishing you were my math teacher
hopefully I have enough content for you here online
Hahaha you
Overall, a very nice explanation.
Thanks for the great teaching Mr/ McLogan!
you are very welcome!
Amazing
I need to pay attention in class but this helps lol
You're channel is nice,but get straight to the point on time
i have a question: i got the correct answer only instead at the beginning my y said “-y=2x-9” because i did -2x which left me with the -y...does that really make a difference to problems like these?
When you do -2x you have to do it to both sides making it -y = -2x + 9, then multiply BOTH SIDES by -1 and get y = 2x - 9. It looks like you only multiplied the right side by -1. Your solution would yield a final answer of x = 8, y = -7, while the correct solution was x = 4, y = -1.
not me watching thi svideo during a test becasue i forgot how to do everything haha...
3x+2y=10
2x-y=9 use 2 as the multiplier
3x+2y=10
4x-2y=18
-------------------
7x=28
x=4
3(4)+2y=10
12+2y=10
2y=-2
y=-1
2(4)-y=9
8-y=9
-y=1
y=-1
Solution: (4, -1)
5X++y===19
5X==19+1y=
5X=20
X=4
Thanks a million that -y was killing me glad u made this video
Please when solving like in the case wer you subtracted -9 on both sides to give 2x-9=y could you still solve with -9+2x=y
yes, this signs are the same so the order does not matter
Brian McLogan thanks
cheers!
X=5
Y=1
10-9==1
-9++10==1
Why is this 8th grades "easy work"
Helped so much!
happy to be able to help
I've been watching a few of these math videos lately and I notice something they all seem to have in common. The "instructor" tries to explain every little step in excruciating detail over and over again. I mean how many times do you need to say that 2 and 2/1 are equal or that being equal means they have the same value? It seems to me that any student who is far enough advanced to be studying systems of equations with two variables must know all that. Are the kids in these classes really so dense as to need these detailed explanations repeated so many times? Maybe so, because one of them always seems to question the explanation.
After reading some of the other comments, I think I know the answer to my question.
there is no point in your comment, if you know it all why are you even watching here, you're just a grumpy old troll
Simon ikr
thanks for the help can you do this problem 4x+y=1 5x-2y=15
sorry just able to focus on what I am currently teaching, follow the same process as the video though
I love you
what if both systems have 1 OR -1. IN OTHER WORDS SAY 4X - Y = -3 AND 6X - Y = -8??
This reeeeaaallyy helped
X is 4 and y is minus 1
Nice😍😍😍😍😍
ur a bloody legend Brian
happy to be able to help
this is algabra 2 im doing it in algabra 1
thank sir
I have 2 math teachers you included.
I'm losing my mind on pre calculus
this is algebra 2? im in algebra 1 and im learning this
Same lol
Same
ganda galing
?
Brian McLogan that is Filipino language. He says Wow! Great
Could i ask what year that was?
probably 9th or 10th
2012
so what hasn't been explained is that the y and the x cant be negative when solving for them
yes we are solving for x and y not -x and -y
All
sir ur good at teaching but u talk fast but i understand just go little slowly
thank you! I know I can go a bit fast on some of my videos