| ( | 125 | ( | 1 | + | 15 100 | ) | ) | + | ( | 8 100 | x | ) | = | x |
| 方程左边 = | 125 | ( | 1 | + | 15 100 | ) | + | ( | 8 100 | x | ) |
| = | 125 | × | 1 | + | 125 | × | 15 100 | + | ( | 8 100 | x | ) |
| = | 125 | + | 75 4 | + | ( | 8 100 | x | ) |
| = | 575 4 | + | ( | 8 100 | x | ) |
| = | 575 4 | + | 8 100 | x |
575 4 | + | 8 100 | x | = | x |
8 100 | x | − | x | = | - | 575 4 |
| - | 23 25 | x | = | - | 575 4 |
575 4 | = | 23 25 | x |
23 25 | x | = | 575 4 |
| x | = | 575 4 | ÷ | 23 25 |
| = | 575 4 | × | 25 23 |
| = | 25 4 | × | 25 |
| x | = | 625 4 |
| x | = | 156.25 |