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-7x+2(x+3)=-39
We move all terms to the left:
-7x+2(x+3)-(-39)=0
We add all the numbers together, and all the variables
-7x+2(x+3)+39=0
We multiply parentheses
-7x+2x+6+39=0
We add all the numbers together, and all the variables
-5x+45=0
We move all terms containing x to the left, all other terms to the right
-5x=-45
x=-45/-5
x=+9
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