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15=1.5v+3
We move all terms to the left:
15-(1.5v+3)=0
We get rid of parentheses
-1.5v-3+15=0
We add all the numbers together, and all the variables
-1.5v+12=0
We move all terms containing v to the left, all other terms to the right
-1.5v=-12
v=-12/-1.5
v=+8
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