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13=7q-19
We move all terms to the left:
13-(7q-19)=0
We get rid of parentheses
-7q+19+13=0
We add all the numbers together, and all the variables
-7q+32=0
We move all terms containing q to the left, all other terms to the right
-7q=-32
q=-32/-7
q=4+4/7
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