121 10 | c | = | ( | 17 5 | + | c | ) | × | 793 100 |
| 方程右边 = | 17 5 | × | 793 100 | + | c | × | 793 100 |
| = | 13481 500 | + | c | × | 793 100 |
121 10 | c | = | 13481 500 | + | 793 100 | c |
121 10 | c | − | 793 100 | c | = | 13481 500 |
417 100 | c | = | 13481 500 |
| c | = | 13481 500 | ÷ | 417 100 |
| = | 13481 500 | × | 100 417 |
| = | 13481 5 | × | 1 417 |
| c | = | 13481 2085 |
| c | = | 6.465707 |