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4=1+v/2
We move all terms to the left:
4-(1+v/2)=0
We add all the numbers together, and all the variables
-(v/2+1)+4=0
We get rid of parentheses
-v/2-1+4=0
We multiply all the terms by the denominator
-v-1*2+4*2=0
We add all the numbers together, and all the variables
-1v+6=0
We move all terms containing v to the left, all other terms to the right
-v=-6
v=-6/-1
v=+6
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