1309 100 | c | = | ( | 16 5 | + | c | ) | × | 797 100 |
| 方程右边 = | 16 5 | × | 797 100 | + | c | × | 797 100 |
| = | 3188 125 | + | c | × | 797 100 |
1309 100 | c | = | 3188 125 | + | 797 100 | c |
1309 100 | c | − | 797 100 | c | = | 3188 125 |
128 25 | c | = | 3188 125 |
| c | = | 3188 125 | ÷ | 128 25 |
| = | 3188 125 | × | 25 128 |
| = | 797 5 | × | 1 32 |
| c | = | 797 160 |
| c | = | 4.98125 |