12=4a+2b+c

Solution for 12=4a+2b+c equation:

Simplifying
12 = 4a + 2b + c

Solving
12 = 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.
12 + -4a = 4a + 2b + -4a + c

Reorder the terms:
12 + -4a = 4a + -4a + 2b + c

Combine like terms: 4a + -4a = 0
12 + -4a = 0 + 2b + c
12 + -4a = 2b + c

Add '-12' to each side of the equation.
12 + -12 + -4a = 2b + -12 + c

Combine like terms: 12 + -12 = 0
0 + -4a = 2b + -12 + c
-4a = 2b + -12 + c

Reorder the terms:
-4a = -12 + 2b + c

Divide each side by '-4'.
a = 3 + -0.5b + -0.25c

Simplifying
a = 3 + -0.5b + -0.25c