| 13 | c | = | ( | 17 5 | + | c | ) | × | 198 25 |
| Right side of the equation = | 17 5 | × | 198 25 | + | c | × | 198 25 |
| = | 3366 125 | + | c | × | 198 25 |
| 13 | c | = | 3366 125 | + | 198 25 | c |
| 13 | c | − | 198 25 | c | = | 3366 125 |
127 25 | c | = | 3366 125 |
| c | = | 3366 125 | ÷ | 127 25 |
| = | 3366 125 | × | 25 127 |
| = | 3366 5 | × | 1 127 |
| c | = | 3366 635 |
| c | = | 5.300787 |