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2.1=3v-2.7
We move all terms to the left:
2.1-(3v-2.7)=0
We get rid of parentheses
-3v+2.7+2.1=0
We add all the numbers together, and all the variables
-3v+4.8=0
We move all terms containing v to the left, all other terms to the right
-3v=-4.8
v=-4.8/-3
v=1+1/1.66666666667
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