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230=-v+130
We move all terms to the left:
230-(-v+130)=0
We add all the numbers together, and all the variables
-(-1v+130)+230=0
We get rid of parentheses
1v-130+230=0
We add all the numbers together, and all the variables
v+100=0
We move all terms containing v to the left, all other terms to the right
v=-100
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