9=-5v+3(v+7)

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Solution for 9=-5v+3(v+7) equation:


Simplifying
9 = -5v + 3(v + 7)

Reorder the terms:
9 = -5v + 3(7 + v)
9 = -5v + (7 * 3 + v * 3)
9 = -5v + (21 + 3v)

Reorder the terms:
9 = 21 + -5v + 3v

Combine like terms: -5v + 3v = -2v
9 = 21 + -2v

Solving
9 = 21 + -2v

Solving for variable 'v'.

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

Add '2v' to each side of the equation.
9 + 2v = 21 + -2v + 2v

Combine like terms: -2v + 2v = 0
9 + 2v = 21 + 0
9 + 2v = 21

Add '-9' to each side of the equation.
9 + -9 + 2v = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 2v = 21 + -9
2v = 21 + -9

Combine like terms: 21 + -9 = 12
2v = 12

Divide each side by '2'.
v = 6

Simplifying
v = 6

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