3-10-9=21

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Solution for 3-10-9=21 equation: 


Simplifying
3 + -10 + -9 = 21

Combine like terms: 3 + -10 = -7
-7 + -9 = 21

Combine like terms: -7 + -9 = -16
-16 = 21

Solving
-16 = 21

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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