9-10*4=40

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Solution for 9-10*4=40 equation: 


Simplifying
9 + -10 * 4 = 40

Multiply -10 * 4
9 + -40 = 40

Combine like terms: 9 + -40 = -31
-31 = 40

Solving
-31 = 40

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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