a+a=a+b

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Solution for a+a=a+b equation: 


Simplifying
a + a = a + b

Combine like terms: a + a = 2a
2a = a + b

Solving
2a = a + b

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1a' to each side of the equation.
2a + -1a = a + -1a + b

Combine like terms: 2a + -1a = 1a
1a = a + -1a + b

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

Divide each side by '1'.
a = b

Simplifying
a = b

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