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x+(x-7)=37
We move all terms to the left:
x+(x-7)-(37)=0
We get rid of parentheses
x+x-7-37=0
We add all the numbers together, and all the variables
2x-44=0
We move all terms containing x to the left, all other terms to the right
2x=44
x=44/2
x=22
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