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200=5v-100-2v
We move all terms to the left:
200-(5v-100-2v)=0
We add all the numbers together, and all the variables
-(3v-100)+200=0
We get rid of parentheses
-3v+100+200=0
We add all the numbers together, and all the variables
-3v+300=0
We move all terms containing v to the left, all other terms to the right
-3v=-300
v=-300/-3
v=+100
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