12=20-4v

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Solution for 12=20-4v equation:


Simplifying
12 = 20 + -4v

Solving
12 = 20 + -4v

Solving for variable 'v'.

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

Add '4v' to each side of the equation.
12 + 4v = 20 + -4v + 4v

Combine like terms: -4v + 4v = 0
12 + 4v = 20 + 0
12 + 4v = 20

Add '-12' to each side of the equation.
12 + -12 + 4v = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 4v = 20 + -12
4v = 20 + -12

Combine like terms: 20 + -12 = 8
4v = 8

Divide each side by '4'.
v = 2

Simplifying
v = 2

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