21+7v=7(2v-4)

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Solution for 21+7v=7(2v-4) equation:


Simplifying
21 + 7v = 7(2v + -4)

Reorder the terms:
21 + 7v = 7(-4 + 2v)
21 + 7v = (-4 * 7 + 2v * 7)
21 + 7v = (-28 + 14v)

Solving
21 + 7v = -28 + 14v

Solving for variable 'v'.

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

Add '-14v' to each side of the equation.
21 + 7v + -14v = -28 + 14v + -14v

Combine like terms: 7v + -14v = -7v
21 + -7v = -28 + 14v + -14v

Combine like terms: 14v + -14v = 0
21 + -7v = -28 + 0
21 + -7v = -28

Add '-21' to each side of the equation.
21 + -21 + -7v = -28 + -21

Combine like terms: 21 + -21 = 0
0 + -7v = -28 + -21
-7v = -28 + -21

Combine like terms: -28 + -21 = -49
-7v = -49

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

Simplifying
v = 7

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