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210=54-v
We move all terms to the left:
210-(54-v)=0
We add all the numbers together, and all the variables
-(-1v+54)+210=0
We get rid of parentheses
1v-54+210=0
We add all the numbers together, and all the variables
v+156=0
We move all terms containing v to the left, all other terms to the right
v=-156
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