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X+(X-19)+(X-19)+23=125
We move all terms to the left:
X+(X-19)+(X-19)+23-(125)=0
We add all the numbers together, and all the variables
X+(X-19)+(X-19)-102=0
We get rid of parentheses
X+X+X-19-19-102=0
We add all the numbers together, and all the variables
3X-140=0
We move all terms containing X to the left, all other terms to the right
3X=140
X=140/3
X=46+2/3
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