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-3q=45-8q
We move all terms to the left:
-3q-(45-8q)=0
We add all the numbers together, and all the variables
-3q-(-8q+45)=0
We get rid of parentheses
-3q+8q-45=0
We add all the numbers together, and all the variables
5q-45=0
We move all terms containing q to the left, all other terms to the right
5q=45
q=45/5
q=9
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