(-33)-(-21)=

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Solution for (-33)-(-21)= equation: 


Simplifying
(-33) + -1(-21) = 0
-33 + -1(-21) = 0

Multiply -1 * -21
-33 + 21 = 0

Combine like terms: -33 + 21 = -12
-12 = 0

Solving
-12 = 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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