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3v-12-9=25v-15-6v
We move all terms to the left:
3v-12-9-(25v-15-6v)=0
We add all the numbers together, and all the variables
3v-(19v-15)-12-9=0
We add all the numbers together, and all the variables
3v-(19v-15)-21=0
We get rid of parentheses
3v-19v+15-21=0
We add all the numbers together, and all the variables
-16v-6=0
We move all terms containing v to the left, all other terms to the right
-16v=6
v=6/-16
v=-3/8
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