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v/3+2.1=-2.1
We move all terms to the left:
v/3+2.1-(-2.1)=0
We add all the numbers together, and all the variables
v/3+4.2=0
We multiply all the terms by the denominator
v+(4.2)*3=0
We add all the numbers together, and all the variables
v+12.6=0
We move all terms containing v to the left, all other terms to the right
v=-12.6
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