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6+3(-x-2)=12
We move all terms to the left:
6+3(-x-2)-(12)=0
We add all the numbers together, and all the variables
3(-1x-2)+6-12=0
We add all the numbers together, and all the variables
3(-1x-2)-6=0
We multiply parentheses
-3x-6-6=0
We add all the numbers together, and all the variables
-3x-12=0
We move all terms containing x to the left, all other terms to the right
-3x=12
x=12/-3
x=-4
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