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254=77-v
We move all terms to the left:
254-(77-v)=0
We add all the numbers together, and all the variables
-(-1v+77)+254=0
We get rid of parentheses
1v-77+254=0
We add all the numbers together, and all the variables
v+177=0
We move all terms containing v to the left, all other terms to the right
v=-177
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