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q/2+9=13
We move all terms to the left:
q/2+9-(13)=0
We add all the numbers together, and all the variables
q/2-4=0
We multiply all the terms by the denominator
q-4*2=0
We add all the numbers together, and all the variables
q-8=0
We move all terms containing q to the left, all other terms to the right
q=8
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