| X | + | 4071 20000 | ( | 1 | − | X | ) | = | 40 100 |
| 方程左边 = | X | + | 4071 20000 | × | 1 | − | 4071 20000 | X |
| = | X | + | 4071 20000 | − | 4071 20000 | X |
| = | 15929 20000 | X | + | 4071 20000 |
15929 20000 | X | + | 4071 20000 | = | 40 100 |
15929 20000 | X | = | 40 100 | − | 4071 20000 |
15929 20000 | X | = | 3929 20000 |
| X | = | 3929 20000 | ÷ | 15929 20000 |
| = | 3929 20000 | × | 20000 15929 |
| = | 3929 | × | 1 15929 |
| X | = | 3929 15929 |
| X | = | 0.246657 |