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20v+12.5=170
We move all terms to the left:
20v+12.5-(170)=0
We add all the numbers together, and all the variables
20v-157.5=0
We move all terms containing v to the left, all other terms to the right
20v=157.5
v=157.5/20
v=7+11.666666666667/13.333333333333
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