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205=102-v
We move all terms to the left:
205-(102-v)=0
We add all the numbers together, and all the variables
-(-1v+102)+205=0
We get rid of parentheses
1v-102+205=0
We add all the numbers together, and all the variables
v+103=0
We move all terms containing v to the left, all other terms to the right
v=-103
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