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X+(3X+3)=58
We move all terms to the left:
X+(3X+3)-(58)=0
We get rid of parentheses
X+3X+3-58=0
We add all the numbers together, and all the variables
4X-55=0
We move all terms containing X to the left, all other terms to the right
4X=55
X=55/4
X=13+3/4
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