21=-6v+3(v+6)

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Solution for 21=-6v+3(v+6) equation:


Simplifying
21 = -6v + 3(v + 6)

Reorder the terms:
21 = -6v + 3(6 + v)
21 = -6v + (6 * 3 + v * 3)
21 = -6v + (18 + 3v)

Reorder the terms:
21 = 18 + -6v + 3v

Combine like terms: -6v + 3v = -3v
21 = 18 + -3v

Solving
21 = 18 + -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 = 18 + -3v + 3v

Combine like terms: -3v + 3v = 0
21 + 3v = 18 + 0
21 + 3v = 18

Add '-21' to each side of the equation.
21 + -21 + 3v = 18 + -21

Combine like terms: 21 + -21 = 0
0 + 3v = 18 + -21
3v = 18 + -21

Combine like terms: 18 + -21 = -3
3v = -3

Divide each side by '3'.
v = -1

Simplifying
v = -1

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