10+9=4-2

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Solution for 10+9=4-2 equation: 


Simplifying
10 + 9 = 4 + -2

Combine like terms: 10 + 9 = 19
19 = 4 + -2

Combine like terms: 4 + -2 = 2
19 = 2

Solving
19 = 2

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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