| ( | 33 10 | + | c | ) | × | 399 50 | = | 12 | c |
| 方程左边 = | 33 10 | × | 399 50 | + | c | × | 399 50 |
| = | 13167 500 | + | c | × | 399 50 |
13167 500 | + | 399 50 | c | = | 12 | c |
399 50 | c | − | 12 | c | = | - | 13167 500 |
| - | 201 50 | c | = | - | 13167 500 |
13167 500 | = | 201 50 | c |
201 50 | c | = | 13167 500 |
| c | = | 13167 500 | ÷ | 201 50 |
| = | 13167 500 | × | 50 201 |
| = | 4389 10 | × | 1 67 |
| c | = | 4389 670 |
| c | = | 6.550746 |