21=-7/8v

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Solution for 21=-7/8v equation: 



21=-7/8v

We move all terms to the left:

21-(-7/8v)=0



Domain of the equation: 8v)!=0

v!=0/1

v!=0

v∈R



We get rid of parentheses

7/8v+21=0

We multiply all the terms by the denominator


21*8v+7=0

Wy multiply elements

168v+7=0

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

168v=-7

v=-7/168

v=-1/24

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