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149=243-v
We move all terms to the left:
149-(243-v)=0
We add all the numbers together, and all the variables
-(-1v+243)+149=0
We get rid of parentheses
1v-243+149=0
We add all the numbers together, and all the variables
v-94=0
We move all terms containing v to the left, all other terms to the right
v=94
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