-21=10+9

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Solution for -21=10+9 equation: 


Simplifying
-21 = 10 + 9

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

Solving
-21 = 19

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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