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-q/8=40
We move all terms to the left:
-q/8-(40)=0
We multiply all the terms by the denominator
-q-40*8=0
We add all the numbers together, and all the variables
-1q-320=0
We move all terms containing q to the left, all other terms to the right
-q=320
q=320/-1
q=-320
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