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220=49-v
We move all terms to the left:
220-(49-v)=0
We add all the numbers together, and all the variables
-(-1v+49)+220=0
We get rid of parentheses
1v-49+220=0
We add all the numbers together, and all the variables
v+171=0
We move all terms containing v to the left, all other terms to the right
v=-171
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