9+11=4+-9

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Solution for 9+11=4+-9 equation: 


Simplifying
9 + 11 = 4 + -9

Combine like terms: 9 + 11 = 20
20 = 4 + -9

Combine like terms: 4 + -9 = -5
20 = -5

Solving
20 = -5

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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