12x+21=12x+9

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Solution for 12x+21=12x+9 equation: 


Simplifying
12x + 21 = 12x + 9

Reorder the terms:
21 + 12x = 12x + 9

Reorder the terms:
21 + 12x = 9 + 12x

Add '-12x' to each side of the equation.
21 + 12x + -12x = 9 + 12x + -12x

Combine like terms: 12x + -12x = 0
21 + 0 = 9 + 12x + -12x
21 = 9 + 12x + -12x

Combine like terms: 12x + -12x = 0
21 = 9 + 0
21 = 9

Solving
21 = 9

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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