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90=2q-3+5q+2
We move all terms to the left:
90-(2q-3+5q+2)=0
We add all the numbers together, and all the variables
-(7q-1)+90=0
We get rid of parentheses
-7q+1+90=0
We add all the numbers together, and all the variables
-7q+91=0
We move all terms containing q to the left, all other terms to the right
-7q=-91
q=-91/-7
q=+13
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