-1-8=

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Solution for -1-8= equation: 


Simplifying
-1 + -8 = 0

Combine like terms: -1 + -8 = -9
-9 = 0

Solving
-9 = 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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