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20x-(9x-7)=62
We move all terms to the left:
20x-(9x-7)-(62)=0
We get rid of parentheses
20x-9x+7-62=0
We add all the numbers together, and all the variables
11x-55=0
We move all terms containing x to the left, all other terms to the right
11x=55
x=55/11
x=5
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