-5v+21=-v+9

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Solution for -5v+21=-v+9 equation: 



-5v+21=-v+9

We move all terms to the left:

-5v+21-(-v+9)=0

We add all the numbers together, and all the variables

-5v-(-1v+9)+21=0

We get rid of parentheses

-5v+1v-9+21=0

We add all the numbers together, and all the variables

-4v+12=0

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

-4v=-12

v=-12/-4

v=+3

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