19a-20a=-1a

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Solution for 19a-20a=-1a equation: 


Simplifying
19a + -20a = -1a

Combine like terms: 19a + -20a = -1a
-1a = -1a

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

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

Combine like terms: -1a + a = 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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