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4(3x+2)=39
We move all terms to the left:
4(3x+2)-(39)=0
We multiply parentheses
12x+8-39=0
We add all the numbers together, and all the variables
12x-31=0
We move all terms containing x to the left, all other terms to the right
12x=31
x=31/12
x=2+7/12
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