9+10=21-2

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Solution for 9+10=21-2 equation: 


Simplifying
9 + 10 = 21 + -2

Combine like terms: 9 + 10 = 19
19 = 21 + -2

Combine like terms: 21 + -2 = 19
19 = 19

Add '-19' to each side of the equation.
19 + -19 = 19 + -19

Combine like terms: 19 + -19 = 0
0 = 19 + -19

Combine like terms: 19 + -19 = 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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