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3-q/3=7
We move all terms to the left:
3-q/3-(7)=0
We add all the numbers together, and all the variables
-q/3-4=0
We multiply all the terms by the denominator
-q-4*3=0
We add all the numbers together, and all the variables
-1q-12=0
We move all terms containing q to the left, all other terms to the right
-q=12
q=12/-1
q=-12
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