2c+12-6+c=78

Solution for 2c+12-6+c=78 equation:

Simplifying
2c + 12 + -6 + c = 78

Reorder the terms:
12 + -6 + 2c + c = 78

Combine like terms: 12 + -6 = 6
6 + 2c + c = 78

Combine like terms: 2c + c = 3c
6 + 3c = 78

Solving
6 + 3c = 78

Solving for variable 'c'.

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

Add '-6' to each side of the equation.
6 + -6 + 3c = 78 + -6

Combine like terms: 6 + -6 = 0
0 + 3c = 78 + -6
3c = 78 + -6

Combine like terms: 78 + -6 = 72
3c = 72

Divide each side by '3'.
c = 24

Simplifying
c = 24