3x+9x=12x

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Solution for 3x+9x=12x equation: 


Simplifying
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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