49 4 | c | = | ( | 7 2 | + | c | ) | × | 797 100 |
| 方程右边 = | 7 2 | × | 797 100 | + | c | × | 797 100 |
| = | 5579 200 | + | c | × | 797 100 |
49 4 | c | = | 5579 200 | + | 797 100 | c |
49 4 | c | − | 797 100 | c | = | 5579 200 |
107 25 | c | = | 5579 200 |
| c | = | 5579 200 | ÷ | 107 25 |
| = | 5579 200 | × | 25 107 |
| = | 5579 8 | × | 1 107 |
| c | = | 5579 856 |
| c | = | 6.517523 |