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-4+7x=56-8x
We move all terms to the left:
-4+7x-(56-8x)=0
We add all the numbers together, and all the variables
7x-(-8x+56)-4=0
We get rid of parentheses
7x+8x-56-4=0
We add all the numbers together, and all the variables
15x-60=0
We move all terms containing x to the left, all other terms to the right
15x=60
x=60/15
x=4
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