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3q-7=12q+11.q
We move all terms to the left:
3q-7-(12q+11.q)=0
We add all the numbers together, and all the variables
3q-(+23q)-7=0
We get rid of parentheses
3q-23q-7=0
We add all the numbers together, and all the variables
-20q-7=0
We move all terms containing q to the left, all other terms to the right
-20q=7
q=7/-20
q=-7/20
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