12-x=20-3x

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Solution for 12-x=20-3x equation:


Simplifying
12 + -1x = 20 + -3x

Solving
12 + -1x = 20 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
12 + -1x + 3x = 20 + -3x + 3x

Combine like terms: -1x + 3x = 2x
12 + 2x = 20 + -3x + 3x

Combine like terms: -3x + 3x = 0
12 + 2x = 20 + 0
12 + 2x = 20

Add '-12' to each side of the equation.
12 + -12 + 2x = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 2x = 20 + -12
2x = 20 + -12

Combine like terms: 20 + -12 = 8
2x = 8

Divide each side by '2'.
x = 4

Simplifying
x = 4

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