| 28 | x | × | 3 2 | + | ( | 8 | x | × | 3 | ÷ | 7 | ) | = | 58467 25 |
| 方程左边 = | 42 | x | + | ( | 8 | x | × | 3 | ÷ | 7 | ) |
| 42 | x | + | ( | 8 | x | × | 3 | ÷ | 7 | ) | = | 58467 25 |
| 方程左边 = | 42 | x | + | 8 | x | × | 3 | ÷ | 7 |
| = | 42 | x | + | 24 7 | x |
| = | 318 7 | x |
318 7 | x | = | 58467 25 |
| x | = | 58467 25 | ÷ | 318 7 |
| = | 58467 25 | × | 7 318 |
| = | 19489 25 | × | 7 106 |
| x | = | 136423 2650 |
| x | = | 51.480377 |