12=3x-x-4x

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Solution for 12=3x-x-4x equation:


Simplifying
12 = 3x + -1x + -4x

Combine like terms: 3x + -1x = 2x
12 = 2x + -4x

Combine like terms: 2x + -4x = -2x
12 = -2x

Solving
12 = -2x

Solving for variable 'x'.

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

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

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

Add '-12' to each side of the equation.
12 + -12 + 2x = 0 + -12

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

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

Divide each side by '2'.
x = -6

Simplifying
x = -6

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