| ( | 1 | + | x | ) | ( | 1 | + | 2 100 | ) | = | 1 | + | 5 200 |
| 方程左边 = | 1 | ( | 1 | + | 2 100 | ) | + | x | ( | 1 | + | 2 100 | ) |
| = | 1 | × | 1 | + | 1 | × | 2 100 | + | x | ( | 1 | + | 2 100 | ) |
| = | 1 | + | 1 50 | + | x | ( | 1 | + | 2 100 | ) |
| = | 51 50 | + | x | ( | 1 | + | 2 100 | ) |
| = | 51 50 | + | x | × | 1 | + | x | × | 2 100 |
| = | 51 50 | + | 51 50 | x |
51 50 | + | 51 50 | x | = | 1 | + | 5 200 |
| 方程右边 = | 41 40 |
51 50 | + | 51 50 | x | = | 41 40 |
51 50 | x | = | 41 40 | − | 51 50 |
51 50 | x | = | 1 200 |
| x | = | 1 200 | ÷ | 51 50 |
| = | 1 200 | × | 50 51 |
| = | 1 4 | × | 1 51 |
| x | = | 1 204 |
| x | = | 0.004902 |