(-x)+0=-x

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Solution for (-x)+0=-x equation: 


Simplifying
(-1x) + 0 = -1x

Reorder the terms:
0 + (-1x) = -1x
Remove the zero:
(-1x) = -1x

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

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

Combine like terms: -1x + x = 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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