| ( | 162 | + | 391 2 | ) | ÷ | 31 | × | x | + | 527 2 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1664 |
| 方程左边 = | ( | 162 | + | 391 2 | ) | × | 1 31 | x | + | 17 2 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 162 | + | 391 2 | ) | × | 1 31 | x | + | 17 2 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1664 |
| 方程左边 = | 162 | × | 1 31 | x | + | 391 2 | × | 1 31 | x | + | 17 2 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 162 31 | x | + | 391 62 | x | + | 17 2 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 715 62 | x | + | 17 2 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 715 62 | x | + | 17 2 | x | + | 17 2 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 715 62 | x | + | 17 2 | x | + | 255 2 | + | 4 | ( | x | + | 30 | ) |
| = | 621 31 | x | + | 255 2 | + | 4 | ( | x | + | 30 | ) |
| = | 621 31 | x | + | 255 2 | + | 4 | x | + | 4 | × | 30 |
| = | 621 31 | x | + | 255 2 | + | 4 | x | + | 120 |
| = | 745 31 | x | + | 495 2 |
745 31 | x | + | 495 2 | = | 1664 |
745 31 | x | = | 1664 | − | 495 2 |
745 31 | x | = | 2833 2 |
| x | = | 2833 2 | ÷ | 745 31 |
| = | 2833 2 | × | 31 745 |
| x | = | 87823 1490 |
| x | = | 58.941611 |