20.5=9a+3b+c

Solution for 20.5=9a+3b+c equation:

Simplifying
20.5 = 9a + 3b + c

Solving
20.5 = 9a + 3b + c

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.
20.5 + -9a = 9a + 3b + -9a + c

Reorder the terms:
20.5 + -9a = 9a + -9a + 3b + c

Combine like terms: 9a + -9a = 0
20.5 + -9a = 0 + 3b + c
20.5 + -9a = 3b + c

Add '-20.5' to each side of the equation.
20.5 + -20.5 + -9a = 3b + -20.5 + c

Combine like terms: 20.5 + -20.5 = 0.0
0.0 + -9a = 3b + -20.5 + c
-9a = 3b + -20.5 + c

Reorder the terms:
-9a = -20.5 + 3b + c

Divide each side by '-9'.
a = 2.277777778 + -0.3333333333b + -0.1111111111c

Simplifying
a = 2.277777778 + -0.3333333333b + -0.1111111111c