| ( | 168 | + | 317 | ) | ÷ | 31 | × | x | + | 211 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1447 |
| 方程左边 = | ( | 168 | + | 317 | ) | × | 1 31 | x | + | 211 31 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 168 | + | 317 | ) | × | 1 31 | x | + | 211 31 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1447 |
| 方程左边 = | 168 | × | 1 31 | x | + | 317 | × | 1 31 | x | + | 211 31 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 168 31 | x | + | 317 31 | x | + | 211 31 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 485 31 | x | + | 211 31 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 485 31 | x | + | 211 31 | x | + | 211 31 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 485 31 | x | + | 211 31 | x | + | 3165 31 | + | 4 | ( | x | + | 30 | ) |
| = | 696 31 | x | + | 3165 31 | + | 4 | ( | x | + | 30 | ) |
| = | 696 31 | x | + | 3165 31 | + | 4 | x | + | 4 | × | 30 |
| = | 696 31 | x | + | 3165 31 | + | 4 | x | + | 120 |
| = | 820 31 | x | + | 6885 31 |
820 31 | x | + | 6885 31 | = | 1447 |
820 31 | x | = | 1447 | − | 6885 31 |
820 31 | x | = | 37972 31 |
| x | = | 37972 31 | ÷ | 820 31 |
| = | 37972 31 | × | 31 820 |
| = | 9493 | × | 1 205 |
| x | = | 9493 205 |
| x | = | 46.307317 |