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X+(X-50)+2X=180
We move all terms to the left:
X+(X-50)+2X-(180)=0
We add all the numbers together, and all the variables
3X+(X-50)-180=0
We get rid of parentheses
3X+X-50-180=0
We add all the numbers together, and all the variables
4X-230=0
We move all terms containing X to the left, all other terms to the right
4X=230
X=230/4
X=57+1/2
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