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-q/2=-3
We move all terms to the left:
-q/2-(-3)=0
We add all the numbers together, and all the variables
-q/2+3=0
We multiply all the terms by the denominator
-q+3*2=0
We add all the numbers together, and all the variables
-1q+6=0
We move all terms containing q to the left, all other terms to the right
-q=-6
q=-6/-1
q=+6
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