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7(-2x-8)=-126
We move all terms to the left:
7(-2x-8)-(-126)=0
We add all the numbers together, and all the variables
7(-2x-8)+126=0
We multiply parentheses
-14x-56+126=0
We add all the numbers together, and all the variables
-14x+70=0
We move all terms containing x to the left, all other terms to the right
-14x=-70
x=-70/-14
x=+5
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