| x | = | 50 | + | ( | ( | 50 | + | ( | 50 | × | 20 100 | ) | ) | × | 10 100 | ) |
| 方程右边 = | 50 | + | ( | 50 | + | ( | 50 | × | 20 100 | ) | ) | × | 10 100 |
| = | 50 | + | 50 | × | 10 100 | + | ( | 50 | × | 20 100 | ) | × | 10 100 |
| = | 50 | + | 5 | + | ( | 50 | × | 20 100 | ) | × | 10 100 |
| = | 55 | + | ( | 50 | × | 20 100 | ) | × | 10 100 |
| = | 55 | + | 50 | × | 20 100 | × | 10 100 |
| = | 55 | + | 1 |
| = | 56 |
| x | = | 56 |