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42=7+7q
We move all terms to the left:
42-(7+7q)=0
We add all the numbers together, and all the variables
-(7q+7)+42=0
We get rid of parentheses
-7q-7+42=0
We add all the numbers together, and all the variables
-7q+35=0
We move all terms containing q to the left, all other terms to the right
-7q=-35
q=-35/-7
q=+5
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