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FB64 your right crossing out 5-5 is just crossing out 0 which crossing out really means dividing on both sides good catch!
You can't get from 4(5-5) = 5(5-5) to 4 = 5. When you cross out the (5-5) on both sides of the equation, you're dividing both sides by (5-5). You're dividing both sides by 0, which is not allowed. Math is not broken; just misapplied.
FB64 your right crossing out 5-5 is just crossing out 0 which crossing out really means dividing on both sides good catch!
You can't get from 4(5-5) = 5(5-5) to 4 = 5. When you cross out the (5-5) on both sides of the equation, you're dividing both sides by (5-5). You're dividing both sides by 0, which is not allowed. Math is not broken; just misapplied.