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X+(X+3)+2X=180
We move all terms to the left:
X+(X+3)+2X-(180)=0
We add all the numbers together, and all the variables
3X+(X+3)-180=0
We get rid of parentheses
3X+X+3-180=0
We add all the numbers together, and all the variables
4X-177=0
We move all terms containing X to the left, all other terms to the right
4X=177
X=177/4
X=44+1/4
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