15+6-9=

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Solution for 15+6-9= equation: 


Simplifying
15 + 6 + -9 = 0

Combine like terms: 15 + 6 = 21
21 + -9 = 0

Combine like terms: 21 + -9 = 12
12 = 0

Solving
12 = 0

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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