21=8+v

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Solution for 21=8+v equation:


Simplifying
21 = 8 + v

Solving
21 = 8 + v

Solving for variable 'v'.

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

Add '-1v' to each side of the equation.
21 + -1v = 8 + v + -1v

Combine like terms: v + -1v = 0
21 + -1v = 8 + 0
21 + -1v = 8

Add '-21' to each side of the equation.
21 + -21 + -1v = 8 + -21

Combine like terms: 21 + -21 = 0
0 + -1v = 8 + -21
-1v = 8 + -21

Combine like terms: 8 + -21 = -13
-1v = -13

Divide each side by '-1'.
v = 13

Simplifying
v = 13

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