-21=7(v-6)-4v

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Solution for -21=7(v-6)-4v equation:


Simplifying
-21 = 7(v + -6) + -4v

Reorder the terms:
-21 = 7(-6 + v) + -4v
-21 = (-6 * 7 + v * 7) + -4v
-21 = (-42 + 7v) + -4v

Combine like terms: 7v + -4v = 3v
-21 = -42 + 3v

Solving
-21 = -42 + 3v

Solving for variable 'v'.

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

Add '-3v' to each side of the equation.
-21 + -3v = -42 + 3v + -3v

Combine like terms: 3v + -3v = 0
-21 + -3v = -42 + 0
-21 + -3v = -42

Add '21' to each side of the equation.
-21 + 21 + -3v = -42 + 21

Combine like terms: -21 + 21 = 0
0 + -3v = -42 + 21
-3v = -42 + 21

Combine like terms: -42 + 21 = -21
-3v = -21

Divide each side by '-3'.
v = 7

Simplifying
v = 7

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