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56=7q.7.8.9
We move all terms to the left:
56-(7q.7.8.9)=0
We add all the numbers together, and all the variables
-(+7q.7.8.9)+56=0
We get rid of parentheses
-7q.7.8.9+56=0
We move all terms containing q to the left, all other terms to the right
-7q.7.8.9=-56
q=-56/1
q=-56
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