1-(-21)=

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Solution for 1-(-21)= equation: 


Simplifying
1 + -1(-21) = 0

Multiply -1 * -21
1 + 21 = 0

Combine like terms: 1 + 21 = 22
22 = 0

Solving
22 = 0

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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