3-2-1=21

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Solution for 3-2-1=21 equation: 


Simplifying
3 + -2 + -1 = 21

Combine like terms: 3 + -2 = 1
1 + -1 = 21

Combine like terms: 1 + -1 = 0
0 = 21

Solving
0 = 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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