| X | + | X | × | 1 10 | + | ( | X | + | X | × | 1 10 | ) | × | 3 50 | = | 798 |
| 方程左边 = | 11 10 | X | + | ( | X | + | X | × | 1 10 | ) | × | 3 50 |
11 10 | X | + | ( | X | + | X | × | 1 10 | ) | × | 3 50 | = | 798 |
| 方程左边 = | 11 10 | X | + | X | × | 3 50 | + | X | × | 1 10 | × | 3 50 |
| = | 11 10 | X | + | X | × | 3 50 | + | X | × | 3 500 |
| = | 583 500 | X |
583 500 | X | = | 798 |
| X | = | 798 | ÷ | 583 500 |
| = | 798 | × | 500 583 |
| X | = | 399000 583 |
| X | = | 684.391081 |