21-2(6+3)=

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Solution for 21-2(6+3)= equation: 


Simplifying
21 + -2(6 + 3) = 0

Combine like terms: 6 + 3 = 9
21 + -2(9) = 0

Multiply -2 * 9
21 + -18 = 0

Combine like terms: 21 + -18 = 3
3 = 0

Solving
3 = 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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