a=9a+-20

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Solution for a=9a+-20 equation: 


Simplifying
a = 9a + -20

Reorder the terms:
a = -20 + 9a

Solving
a = -20 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
a + -9a = -20 + 9a + -9a

Combine like terms: a + -9a = -8a
-8a = -20 + 9a + -9a

Combine like terms: 9a + -9a = 0
-8a = -20 + 0
-8a = -20

Divide each side by '-8'.
a = 2.5

Simplifying
a = 2.5

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