| x | ÷ | ( | 1 10 | − | x | ) | = | 8689 5000 |
| 方程两边同时乘以: | ( | 1 10 | − | x | ) |
| x | = | 8689 5000 | ( | 1 10 | − | x | ) |
| x | = | 8689 5000 | × | 1 10 | − | 8689 5000 | x |
| x | = | 8689 50000 | − | 8689 5000 | x |
| x | + | 8689 5000 | x | = | 8689 50000 |
13689 5000 | x | = | 8689 50000 |
| x | = | 8689 50000 | ÷ | 13689 5000 |
| = | 8689 50000 | × | 5000 13689 |
| = | 8689 10 | × | 1 13689 |
| x | = | 8689 136890 |
| x | = | 0.063474 |