21+18=39

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Solution for 21+18=39 equation: 


Simplifying
21 + 18 = 39

Combine like terms: 21 + 18 = 39
39 = 39

Add '-39' to each side of the equation.
39 + -39 = 39 + -39

Combine like terms: 39 + -39 = 0
0 = 39 + -39

Combine like terms: 39 + -39 = 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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