4v+9=7v-21

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Solution for 4v+9=7v-21 equation:


Simplifying
4v + 9 = 7v + -21

Reorder the terms:
9 + 4v = 7v + -21

Reorder the terms:
9 + 4v = -21 + 7v

Solving
9 + 4v = -21 + 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.
9 + 4v + -7v = -21 + 7v + -7v

Combine like terms: 4v + -7v = -3v
9 + -3v = -21 + 7v + -7v

Combine like terms: 7v + -7v = 0
9 + -3v = -21 + 0
9 + -3v = -21

Add '-9' to each side of the equation.
9 + -9 + -3v = -21 + -9

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

Combine like terms: -21 + -9 = -30
-3v = -30

Divide each side by '-3'.
v = 10

Simplifying
v = 10

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