x-9+9=x

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Solution for x-9+9=x equation: 


Simplifying
x + -9 + 9 = x

Reorder the terms:
-9 + 9 + x = x

Combine like terms: -9 + 9 = 0
0 + x = x
x = x

Add '-1x' to each side of the equation.
x + -1x = x + -1x

Combine like terms: x + -1x = 0
0 = x + -1x

Combine like terms: x + -1x = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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