| ( | 145 | + | 431 | ) | ÷ | 31 | × | x | + | 124 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 93 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 584 |
| 方程左边 = | ( | 145 | + | 431 | ) | × | 1 31 | x | + | 4 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| ( | 145 | + | 431 | ) | × | 1 31 | x | + | 4 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 584 |
| 方程左边 = | 145 | × | 1 31 | x | + | 431 | × | 1 31 | x | + | 4 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 145 31 | x | + | 431 31 | x | + | 4 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 576 31 | x | + | 4 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 576 31 | x | + | 4 | x | + | 4 | × | 15 | + | 3 | ( | x | + | 30 | ) |
| = | 576 31 | x | + | 4 | x | + | 60 | + | 3 | ( | x | + | 30 | ) |
| = | 700 31 | x | + | 60 | + | 3 | ( | x | + | 30 | ) |
| = | 700 31 | x | + | 60 | + | 3 | x | + | 3 | × | 30 |
| = | 700 31 | x | + | 60 | + | 3 | x | + | 90 |
| = | 793 31 | x | + | 150 |
793 31 | x | + | 150 | = | 584 |
793 31 | x | = | 584 | − | 150 |
793 31 | x | = | 434 |
| x | = | 434 | ÷ | 793 31 |
| = | 434 | × | 31 793 |
| x | = | 13454 793 |
| x | = | 16.965952 |