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-10=-q/4-13
We move all terms to the left:
-10-(-q/4-13)=0
We get rid of parentheses
q/4+13-10=0
We multiply all the terms by the denominator
q+13*4-10*4=0
We add all the numbers together, and all the variables
q+12=0
We move all terms containing q to the left, all other terms to the right
q=-12
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