| X | ÷ | 126 | − | ( | 100 | − | X | ) | ÷ | 1400 | = | 1 10 |
| 方程左边 = | 1 126 | X | − | 100 | × | 1 1400 | + | X | × | 1 1400 |
| = | 1 126 | X | − | 1 14 | + | X | × | 1 1400 |
| = | 109 12600 | X | − | 1 14 |
109 12600 | X | − | 1 14 | = | 1 10 |
109 12600 | X | = | 1 10 | + | 1 14 |
109 12600 | X | = | 6 35 |
| X | = | 6 35 | ÷ | 109 12600 |
| = | 6 35 | × | 12600 109 |
| = | 6 | × | 360 109 |
| X | = | 2160 109 |
| X | = | 19.816514 |