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-4v/10=20
We move all terms to the left:
-4v/10-(20)=0
We multiply all the terms by the denominator
-4v-20*10=0
We add all the numbers together, and all the variables
-4v-200=0
We move all terms containing v to the left, all other terms to the right
-4v=200
v=200/-4
v=-50
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