a-b+b-a=

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Solution for a-b+b-a= equation: 


Simplifying
a + -1b + b + -1a = 0

Reorder the terms:
a + -1a + -1b + b = 0

Combine like terms: a + -1a = 0
0 + -1b + b = 0
-1b + b = 0

Combine like terms: -1b + b = 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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