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