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6(-7-2x)=-126
We move all terms to the left:
6(-7-2x)-(-126)=0
We add all the numbers together, and all the variables
6(-2x-7)-(-126)=0
We add all the numbers together, and all the variables
6(-2x-7)+126=0
We multiply parentheses
-12x-42+126=0
We add all the numbers together, and all the variables
-12x+84=0
We move all terms containing x to the left, all other terms to the right
-12x=-84
x=-84/-12
x=+7
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