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