1-9=80

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Solution for 1-9=80 equation: 


Simplifying
1 + -9 = 80

Combine like terms: 1 + -9 = -8
-8 = 80

Solving
-8 = 80

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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