12+c=-2c

Solution for 12+c=-2c equation:

Simplifying
12 + c = -2c

Solving
12 + c = -2c

Solving for variable 'c'.

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

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

Combine like terms: c + 2c = 3c
12 + 3c = -2c + 2c

Combine like terms: -2c + 2c = 0
12 + 3c = 0

Add '-12' to each side of the equation.
12 + -12 + 3c = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 3c = 0 + -12
3c = 0 + -12

Combine like terms: 0 + -12 = -12
3c = -12

Divide each side by '3'.
c = -4

Simplifying
c = -4