3x-6x-9x=-12x

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Solution for 3x-6x-9x=-12x equation: 


Simplifying
3x + -6x + -9x = -12x

Combine like terms: 3x + -6x = -3x
-3x + -9x = -12x

Combine like terms: -3x + -9x = -12x
-12x = -12x

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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