42=-2(v-8)

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Solution for 42=-2(v-8) equation:


Simplifying
42 = -2(v + -8)

Reorder the terms:
42 = -2(-8 + v)
42 = (-8 * -2 + v * -2)
42 = (16 + -2v)

Solving
42 = 16 + -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.
42 + 2v = 16 + -2v + 2v

Combine like terms: -2v + 2v = 0
42 + 2v = 16 + 0
42 + 2v = 16

Add '-42' to each side of the equation.
42 + -42 + 2v = 16 + -42

Combine like terms: 42 + -42 = 0
0 + 2v = 16 + -42
2v = 16 + -42

Combine like terms: 16 + -42 = -26
2v = -26

Divide each side by '2'.
v = -13

Simplifying
v = -13

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