6-21=3

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Solution for 6-21=3 equation: 


Simplifying
6 + -21 = 3

Combine like terms: 6 + -21 = -15
-15 = 3

Solving
-15 = 3

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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