rob9498 rob9498

11-10-2018
Business

contestada

whats x-(4x-7)=5x-(x+21)

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bbymatt0521 bbymatt0521

11-10-2018

x-4x+7=5x-x-21
x-9x+7=-x-21
-8x+7=-x-21
-7x+7=-21
-7x=-28
x=4

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