| ( | 465 | ( | 1 | + | 20 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| 方程左边 = | 465 | ( | 1 | + | 20 100 | ) | + | ( | 7 100 | x | ) |
| = | 465 | × | 1 | + | 465 | × | 20 100 | + | ( | 7 100 | x | ) |
| = | 465 | + | 93 | + | ( | 7 100 | x | ) |
| = | 558 | + | ( | 7 100 | x | ) |
| = | 558 | + | 7 100 | x |
| 558 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 558 |
| - | 93 100 | x | = | - | 558 |
| 558 | = | 93 100 | x |
93 100 | x | = | 558 |
| x | = | 558 | ÷ | 93 100 |
| = | 558 | × | 100 93 |
| = | 6 | × | 100 |
| x | = | 600 |