x+y-x-y=

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Solution for x+y-x-y= equation: 


Simplifying
x + y + -1x + -1y = 0

Reorder the terms:
x + -1x + y + -1y = 0

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

Combine like terms: y + -1y = 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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