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7(6v+3)=21+6v
We move all terms to the left:
7(6v+3)-(21+6v)=0
We add all the numbers together, and all the variables
7(6v+3)-(6v+21)=0
We multiply parentheses
42v-(6v+21)+21=0
We get rid of parentheses
42v-6v-21+21=0
We add all the numbers together, and all the variables
36v=0
v=0/36
v=0
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