21v-21-8v=7v-28-9

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Solution for 21v-21-8v=7v-28-9 equation:


Simplifying
21v + -21 + -8v = 7v + -28 + -9

Reorder the terms:
-21 + 21v + -8v = 7v + -28 + -9

Combine like terms: 21v + -8v = 13v
-21 + 13v = 7v + -28 + -9

Reorder the terms:
-21 + 13v = -28 + -9 + 7v

Combine like terms: -28 + -9 = -37
-21 + 13v = -37 + 7v

Solving
-21 + 13v = -37 + 7v

Solving for variable 'v'.

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

Add '-7v' to each side of the equation.
-21 + 13v + -7v = -37 + 7v + -7v

Combine like terms: 13v + -7v = 6v
-21 + 6v = -37 + 7v + -7v

Combine like terms: 7v + -7v = 0
-21 + 6v = -37 + 0
-21 + 6v = -37

Add '21' to each side of the equation.
-21 + 21 + 6v = -37 + 21

Combine like terms: -21 + 21 = 0
0 + 6v = -37 + 21
6v = -37 + 21

Combine like terms: -37 + 21 = -16
6v = -16

Divide each side by '6'.
v = -2.666666667

Simplifying
v = -2.666666667

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