b=b+2a+c

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

Simplifying
b = b + 2a + c

Reorder the terms:
b = 2a + b + c

Add '-1b' to each side of the equation.
b + -1b = 2a + b + -1b + c

Combine like terms: b + -1b = 0
0 = 2a + b + -1b + c

Combine like terms: b + -1b = 0
0 = 2a + 0 + c
0 = 2a + c

Solving
0 = 2a + c

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
0 + -2a = 2a + -2a + c
Remove the zero:
-2a = 2a + -2a + c

Combine like terms: 2a + -2a = 0
-2a = 0 + c
-2a = c

Divide each side by '-2'.
a = -0.5c

Simplifying
a = -0.5c