90c-60c-17c+6=78

Solution for 90c-60c-17c+6=78 equation:

Simplifying
90c + -60c + -17c + 6 = 78

Reorder the terms:
6 + 90c + -60c + -17c = 78

Combine like terms: 90c + -60c = 30c
6 + 30c + -17c = 78

Combine like terms: 30c + -17c = 13c
6 + 13c = 78

Solving
6 + 13c = 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 + 13c = 78 + -6

Combine like terms: 6 + -6 = 0
0 + 13c = 78 + -6
13c = 78 + -6

Combine like terms: 78 + -6 = 72
13c = 72

Divide each side by '13'.
c = 5.538461538

Simplifying
c = 5.538461538