198 25 | ( | c | + | 16 5 | ) | = | 609 50 | c |
| 方程左边 = | 198 25 | c | + | 198 25 | × | 16 5 |
| = | 198 25 | c | + | 3168 125 |
198 25 | c | + | 3168 125 | = | 609 50 | c |
198 25 | c | − | 609 50 | c | = | - | 3168 125 |
| - | 213 50 | c | = | - | 3168 125 |
3168 125 | = | 213 50 | c |
213 50 | c | = | 3168 125 |
| c | = | 3168 125 | ÷ | 213 50 |
| = | 3168 125 | × | 50 213 |
| = | 1056 5 | × | 2 71 |
| c | = | 2112 355 |
| c | = | 5.949296 |