-1-1=1-21

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Solution for -1-1=1-21 equation: 


Simplifying
-1 + -1 = 1 + -21

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

Combine like terms: 1 + -21 = -20
-2 = -20

Solving
-2 = -20

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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