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-7(x+4)=-3x+28
We move all terms to the left:
-7(x+4)-(-3x+28)=0
We multiply parentheses
-7x-(-3x+28)-28=0
We get rid of parentheses
-7x+3x-28-28=0
We add all the numbers together, and all the variables
-4x-56=0
We move all terms containing x to the left, all other terms to the right
-4x=56
x=56/-4
x=-14
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