121 10 | c | = | ( | 33 10 | + | c | ) | × | 198 25 |
| 方程右边 = | 33 10 | × | 198 25 | + | c | × | 198 25 |
| = | 3267 125 | + | c | × | 198 25 |
121 10 | c | = | 3267 125 | + | 198 25 | c |
121 10 | c | − | 198 25 | c | = | 3267 125 |
209 50 | c | = | 3267 125 |
| c | = | 3267 125 | ÷ | 209 50 |
| = | 3267 125 | × | 50 209 |
| = | 297 5 | × | 2 19 |
| c | = | 594 95 |
| c | = | 6.252632 |