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-(6x+15)=-3
We move all terms to the left:
-(6x+15)-(-3)=0
We add all the numbers together, and all the variables
-(6x+15)+3=0
We get rid of parentheses
-6x-15+3=0
We add all the numbers together, and all the variables
-6x-12=0
We move all terms containing x to the left, all other terms to the right
-6x=12
x=12/-6
x=-2
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