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-42=-5v+3
We move all terms to the left:
-42-(-5v+3)=0
We get rid of parentheses
5v-3-42=0
We add all the numbers together, and all the variables
5v-45=0
We move all terms containing v to the left, all other terms to the right
5v=45
v=45/5
v=9
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