(7-4+9)=

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Solution for (7-4+9)= equation: 


Simplifying
(7 + -4 + 9) = 0

Combine like terms: 7 + -4 = 3
(3 + 9) = 0

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