| ( | ( | 220 | + | 260 | ) | × | 29 | − | x | ) | × | 9 10 | + | 16 | × | 29 | = | 564543 50 |
| 方程左边 = | ( | ( | 220 | + | 260 | ) | × | 29 | − | x | ) | × | 9 10 | + | 464 |
| ( | ( | 220 | + | 260 | ) | × | 29 | − | x | ) | × | 9 10 | + | 464 | = | 564543 50 |
| 方程左边 = | ( | 220 | + | 260 | ) | × | 29 | × | 9 10 | − | x | × | 9 10 | + | 464 |
| = | ( | 220 | + | 260 | ) | × | 261 10 | − | x | × | 9 10 | + | 464 |
| = | 220 | × | 261 10 | + | 260 | × | 261 10 | − | 9 10 | x | + | 464 |
| = | 5742 | + | 6786 | − | 9 10 | x | + | 464 |
| = | 12992 | − | 9 10 | x |
| 12992 | − | 9 10 | x | = | 564543 50 |
| - | 9 10 | x | = | 564543 50 | − | 12992 |
| - | 9 10 | x | = | - | 85057 50 |
85057 50 | = | 9 10 | x |
9 10 | x | = | 85057 50 |
| x | = | 85057 50 | ÷ | 9 10 |
| = | 85057 50 | × | 10 9 |
| = | 85057 5 | × | 1 9 |
| x | = | 85057 45 |
| x | = | 1890.155556 |