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9(1/7q+7)=126
We move all terms to the left:
9(1/7q+7)-(126)=0
Domain of the equation: 7q+7)!=0We multiply parentheses
q∈R
9q+63-126=0
We add all the numbers together, and all the variables
9q-63=0
We move all terms containing q to the left, all other terms to the right
9q=63
q=63/9
q=7
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