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239=-v+50
We move all terms to the left:
239-(-v+50)=0
We add all the numbers together, and all the variables
-(-1v+50)+239=0
We get rid of parentheses
1v-50+239=0
We add all the numbers together, and all the variables
v+189=0
We move all terms containing v to the left, all other terms to the right
v=-189
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