-x=3x+12

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Solution for -x=3x+12 equation: 


Simplifying
-1x = 3x + 12

Reorder the terms:
-1x = 12 + 3x

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

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

Combine like terms: 3x + -3x = 0
-4x = 12 + 0
-4x = 12

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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