3x+9=21+3x

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Solution for 3x+9=21+3x equation: 


Simplifying
3x + 9 = 21 + 3x

Reorder the terms:
9 + 3x = 21 + 3x

Add '-3x' to each side of the equation.
9 + 3x + -3x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
9 + 0 = 21 + 3x + -3x
9 = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
9 = 21 + 0
9 = 21

Solving
9 = 21

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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