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143=-v+283
We move all terms to the left:
143-(-v+283)=0
We add all the numbers together, and all the variables
-(-1v+283)+143=0
We get rid of parentheses
1v-283+143=0
We add all the numbers together, and all the variables
v-140=0
We move all terms containing v to the left, all other terms to the right
v=140
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