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2+v/2=-4
We move all terms to the left:
2+v/2-(-4)=0
We add all the numbers together, and all the variables
v/2+6=0
We multiply all the terms by the denominator
v+6*2=0
We add all the numbers together, and all the variables
v+12=0
We move all terms containing v to the left, all other terms to the right
v=-12
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