13a-8a=-20

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Solution for 13a-8a=-20 equation: 


Simplifying
13a + -8a = -20

Combine like terms: 13a + -8a = 5a
5a = -20

Solving
5a = -20

Solving for variable 'a'.

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

Divide each side by '5'.
a = -4

Simplifying
a = -4

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