21=v/3-13

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Solution for 21=v/3-13 equation: 



21=v/3-13

We move all terms to the left:

21-(v/3-13)=0

We get rid of parentheses

-v/3+13+21=0

We multiply all the terms by the denominator


-v+13*3+21*3=0

We add all the numbers together, and all the variables

-1v+102=0

We move all terms containing v to the left, all other terms to the right

-v=-102

v=-102/-1

v=+102

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