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-7=-3+4v
We move all terms to the left:
-7-(-3+4v)=0
We add all the numbers together, and all the variables
-(4v-3)-7=0
We get rid of parentheses
-4v+3-7=0
We add all the numbers together, and all the variables
-4v-4=0
We move all terms containing v to the left, all other terms to the right
-4v=4
v=4/-4
v=-1
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