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6(3x+3)=-126
We move all terms to the left:
6(3x+3)-(-126)=0
We add all the numbers together, and all the variables
6(3x+3)+126=0
We multiply parentheses
18x+18+126=0
We add all the numbers together, and all the variables
18x+144=0
We move all terms containing x to the left, all other terms to the right
18x=-144
x=-144/18
x=-8
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