| 88 | x | = | 600 | × | 9 10 | + | 4 5 | ( | x | − | 600 | ) |
| 方程右边 = | 540 | + | 4 5 | ( | x | − | 600 | ) |
| 88 | x | = | 540 | + | 4 5 | ( | x | − | 600 | ) |
| 方程右边 = | 540 | + | 4 5 | x | − | 4 5 | × | 600 |
| = | 540 | + | 4 5 | x | − | 480 |
| = | 60 | + | 4 5 | x |
| 88 | x | = | 60 | + | 4 5 | x |
| 88 | x | − | 4 5 | x | = | 60 |
436 5 | x | = | 60 |
| x | = | 60 | ÷ | 436 5 |
| = | 60 | × | 5 436 |
| = | 15 | × | 5 109 |
| x | = | 75 109 |
| x | = | 0.688073 |