| ( | 150 | + | 298 | ) | ÷ | 31 | × | x | + | 248 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 2116 |
| 方程左边 = | ( | 150 | + | 298 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 150 | + | 298 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 2116 |
| 方程左边 = | 150 | × | 1 31 | x | + | 298 | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 150 31 | x | + | 298 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 448 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 448 31 | x | + | 8 | x | + | 8 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 448 31 | x | + | 8 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 696 31 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 696 31 | x | + | 120 | + | 4 | x | + | 4 | × | 30 |
| = | 696 31 | x | + | 120 | + | 4 | x | + | 120 |
| = | 820 31 | x | + | 240 |
820 31 | x | + | 240 | = | 2116 |
820 31 | x | = | 2116 | − | 240 |
820 31 | x | = | 1876 |
| x | = | 1876 | ÷ | 820 31 |
| = | 1876 | × | 31 820 |
| = | 469 | × | 31 205 |
| x | = | 14539 205 |
| x | = | 70.921951 |