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v/4-13=21
We move all terms to the left:
v/4-13-(21)=0
We add all the numbers together, and all the variables
v/4-34=0
We multiply all the terms by the denominator
v-34*4=0
We add all the numbers together, and all the variables
v-136=0
We move all terms containing v to the left, all other terms to the right
v=136
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