a-(b+a)=-b

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


Simplifying
a + -1(b + a) = -1b

Reorder the terms:
a + -1(a + b) = -1b
a + (a * -1 + b * -1) = -1b
a + (-1a + -1b) = -1b

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

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

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

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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