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-4(-7x-7)=-84
We move all terms to the left:
-4(-7x-7)-(-84)=0
We add all the numbers together, and all the variables
-4(-7x-7)+84=0
We multiply parentheses
28x+28+84=0
We add all the numbers together, and all the variables
28x+112=0
We move all terms containing x to the left, all other terms to the right
28x=-112
x=-112/28
x=-4
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