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-3(4x+1)=-39
We move all terms to the left:
-3(4x+1)-(-39)=0
We add all the numbers together, and all the variables
-3(4x+1)+39=0
We multiply parentheses
-12x-3+39=0
We add all the numbers together, and all the variables
-12x+36=0
We move all terms containing x to the left, all other terms to the right
-12x=-36
x=-36/-12
x=+3
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