| ( | 164 | ( | 1 | + | 20 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| 方程左边 = | 164 | ( | 1 | + | 20 100 | ) | + | ( | 7 100 | x | ) |
| = | 164 | × | 1 | + | 164 | × | 20 100 | + | ( | 7 100 | x | ) |
| = | 164 | + | 164 5 | + | ( | 7 100 | x | ) |
| = | 984 5 | + | ( | 7 100 | x | ) |
| = | 984 5 | + | 7 100 | x |
984 5 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 984 5 |
| - | 93 100 | x | = | - | 984 5 |
984 5 | = | 93 100 | x |
93 100 | x | = | 984 5 |
| x | = | 984 5 | ÷ | 93 100 |
| = | 984 5 | × | 100 93 |
| = | 328 | × | 20 31 |
| x | = | 6560 31 |
| x | = | 211.612903 |