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-28=-7+v/3
We move all terms to the left:
-28-(-7+v/3)=0
We add all the numbers together, and all the variables
-(v/3-7)-28=0
We get rid of parentheses
-v/3+7-28=0
We multiply all the terms by the denominator
-v+7*3-28*3=0
We add all the numbers together, and all the variables
-1v-63=0
We move all terms containing v to the left, all other terms to the right
-v=63
v=63/-1
v=-63
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