a=a+b+c

Solution for a=a+b+c equation:

Simplifying
a = a + b + c

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

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

Reorder the terms:
0 = a + -1a + b + c

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

Solving
0 = b + c

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
0 + -1b = b + -1b + c
Remove the zero:
-1b = b + -1b + c

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

Divide each side by '-1'.
b = -1c

Simplifying
b = -1c