21+21+9=51

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Solution for 21+21+9=51 equation: 


Simplifying
21 + 21 + 9 = 51

Combine like terms: 21 + 21 = 42
42 + 9 = 51

Combine like terms: 42 + 9 = 51
51 = 51

Add '-51' to each side of the equation.
51 + -51 = 51 + -51

Combine like terms: 51 + -51 = 0
0 = 51 + -51

Combine like terms: 51 + -51 = 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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