a-13=5+a

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Solution for a-13=5+a equation: 


Simplifying
a + -13 = 5 + a

Reorder the terms:
-13 + a = 5 + a

Add '-1a' to each side of the equation.
-13 + a + -1a = 5 + a + -1a

Combine like terms: a + -1a = 0
-13 + 0 = 5 + a + -1a
-13 = 5 + a + -1a

Combine like terms: a + -1a = 0
-13 = 5 + 0
-13 = 5

Solving
-13 = 5

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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