| x | + | 2200 | + | 1 5 | ( | x | + | 2200 | ) | + | 3 5 | ( | x | + | 2200 | + | 1 5 | ( | x | + | 2200 | ) | ) | = | 23320 |
| 方程左边 = | x | + | 2200 | + | 1 5 | x | + | 1 5 | × | 2200 | + | 3 5 | ( | x | + | 2200 | + | 1 5 | ( | x | + | 2200 | ) | ) |
| = | x | + | 2200 | + | 1 5 | x | + | 440 | + | 3 5 | ( | x | + | 2200 | + | 1 5 | ( | x | + | 2200 | ) | ) |
| = | 6 5 | x | + | 2640 | + | 3 5 | ( | x | + | 2200 | + | 1 5 | ( | x | + | 2200 | ) | ) |
| = | 6 5 | x | + | 2640 | + | 3 5 | x | + | 3 5 | × | 2200 | + | 3 5 | × | 1 5 | ( | x | + | 2200 | ) |
| = | 6 5 | x | + | 2640 | + | 3 5 | x | + | 1320 | + | 3 25 | ( | x | + | 2200 | ) |
| = | 9 5 | x | + | 3960 | + | 3 25 | ( | x | + | 2200 | ) |
| = | 9 5 | x | + | 3960 | + | 3 25 | x | + | 3 25 | × | 2200 |
| = | 9 5 | x | + | 3960 | + | 3 25 | x | + | 264 |
| = | 48 25 | x | + | 4224 |
48 25 | x | + | 4224 | = | 23320 |
48 25 | x | = | 23320 | − | 4224 |
48 25 | x | = | 19096 |
| x | = | 19096 | ÷ | 48 25 |
| = | 19096 | × | 25 48 |
| = | 2387 | × | 25 6 |
| x | = | 59675 6 |
| x | = | 9945.833333 |