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-2+5v=7+2v
We move all terms to the left:
-2+5v-(7+2v)=0
We add all the numbers together, and all the variables
5v-(2v+7)-2=0
We get rid of parentheses
5v-2v-7-2=0
We add all the numbers together, and all the variables
3v-9=0
We move all terms containing v to the left, all other terms to the right
3v=9
v=9/3
v=3
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