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288=-v+31
We move all terms to the left:
288-(-v+31)=0
We add all the numbers together, and all the variables
-(-1v+31)+288=0
We get rid of parentheses
1v-31+288=0
We add all the numbers together, and all the variables
v+257=0
We move all terms containing v to the left, all other terms to the right
v=-257
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