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1+v/2=-4.12
We move all terms to the left:
1+v/2-(-4.12)=0
We add all the numbers together, and all the variables
v/2+5.12=0
We multiply all the terms by the denominator
v+(5.12)*2=0
We add all the numbers together, and all the variables
v+10.24=0
We move all terms containing v to the left, all other terms to the right
v=-10.24
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