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278=39-v
We move all terms to the left:
278-(39-v)=0
We add all the numbers together, and all the variables
-(-1v+39)+278=0
We get rid of parentheses
1v-39+278=0
We add all the numbers together, and all the variables
v+239=0
We move all terms containing v to the left, all other terms to the right
v=-239
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