20=3-9a

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Solution for 20=3-9a equation:


Simplifying
20 = 3 + -9a

Solving
20 = 3 + -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.
20 + 9a = 3 + -9a + 9a

Combine like terms: -9a + 9a = 0
20 + 9a = 3 + 0
20 + 9a = 3

Add '-20' to each side of the equation.
20 + -20 + 9a = 3 + -20

Combine like terms: 20 + -20 = 0
0 + 9a = 3 + -20
9a = 3 + -20

Combine like terms: 3 + -20 = -17
9a = -17

Divide each side by '9'.
a = -1.888888889

Simplifying
a = -1.888888889

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