9=4a+2b+c

Solution for 9=4a+2b+c equation:

Simplifying
9 = 4a + 2b + c

Solving
9 = 4a + 2b + c

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
9 + -4a = 4a + 2b + -4a + c

Reorder the terms:
9 + -4a = 4a + -4a + 2b + c

Combine like terms: 4a + -4a = 0
9 + -4a = 0 + 2b + c
9 + -4a = 2b + c

Add '-9' to each side of the equation.
9 + -9 + -4a = 2b + -9 + c

Combine like terms: 9 + -9 = 0
0 + -4a = 2b + -9 + c
-4a = 2b + -9 + c

Reorder the terms:
-4a = -9 + 2b + c

Divide each side by '-4'.
a = 2.25 + -0.5b + -0.25c

Simplifying
a = 2.25 + -0.5b + -0.25c