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3(2x+9)=-39+54
We move all terms to the left:
3(2x+9)-(-39+54)=0
We add all the numbers together, and all the variables
3(2x+9)-15=0
We multiply parentheses
6x+27-15=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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