9+4=15-2

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Solution for 9+4=15-2 equation: 


Simplifying
9 + 4 = 15 + -2

Combine like terms: 9 + 4 = 13
13 = 15 + -2

Combine like terms: 15 + -2 = 13
13 = 13

Add '-13' to each side of the equation.
13 + -13 = 13 + -13

Combine like terms: 13 + -13 = 0
0 = 13 + -13

Combine like terms: 13 + -13 = 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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