12v=9v+21

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Solution for 12v=9v+21 equation: 


Simplifying
12v = 9v + 21

Reorder the terms:
12v = 21 + 9v

Solving
12v = 21 + 9v

Solving for variable 'v'.

Move all terms containing v to the left, all other terms to the right.

Add '-9v' to each side of the equation.
12v + -9v = 21 + 9v + -9v

Combine like terms: 12v + -9v = 3v
3v = 21 + 9v + -9v

Combine like terms: 9v + -9v = 0
3v = 21 + 0
3v = 21

Divide each side by '3'.
v = 7

Simplifying
v = 7

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