66 5 | c | = | ( | 33 10 | + | c | ) | × | 397 50 |
| Right side of the equation = | 33 10 | × | 397 50 | + | c | × | 397 50 |
| = | 13101 500 | + | c | × | 397 50 |
66 5 | c | = | 13101 500 | + | 397 50 | c |
66 5 | c | − | 397 50 | c | = | 13101 500 |
263 50 | c | = | 13101 500 |
| c | = | 13101 500 | ÷ | 263 50 |
| = | 13101 500 | × | 50 263 |
| = | 13101 10 | × | 1 263 |
| c | = | 13101 2630 |
| c | = | 4.981369 |