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X+X=37-X=7
We move all terms to the left:
X+X-(37-X)=0
We add all the numbers together, and all the variables
X+X-(-1X+37)=0
We add all the numbers together, and all the variables
2X-(-1X+37)=0
We get rid of parentheses
2X+1X-37=0
We add all the numbers together, and all the variables
3X-37=0
We move all terms containing X to the left, all other terms to the right
3X=37
X=37/3
X=12+1/3
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