(21-8)=

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Solution for (21-8)= equation: 


Simplifying
(21 + -8) = 0

Combine like terms: 21 + -8 = 13
(13) = 0
13 = 0

Solving
13 = 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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