-(3+9)=

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Solution for -(3+9)= equation: 


Simplifying
-1(3 + 9) = 0

Combine like terms: 3 + 9 = 12
-1(12) = 0

Multiply -1 * 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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