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27.5+-7v=5.1
We move all terms to the left:
27.5+-7v-(5.1)=0
We add all the numbers together, and all the variables
-7v+22.4=0
We move all terms containing v to the left, all other terms to the right
-7v=-22.4
v=-22.4/-7
v=3+1/5
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