| 2 | ( | X | × | 1 | ) | + | 2 | ( | X | × | 9 10 | ) | + | 2 | ( | X | × | 4 5 | ) | = | 18256 |
| 方程左边 = | 2 | X | × | 1 | + | 2 | ( | X | × | 9 10 | ) | + | 2 | ( | X | × | 4 5 | ) |
| = | 2 | X | + | 2 | ( | X | × | 9 10 | ) | + | 2 | ( | X | × | 4 5 | ) |
| = | 2 | X | + | 2 | X | × | 9 10 | + | 2 | ( | X | × | 4 5 | ) |
| = | 2 | X | + | 9 5 | X | + | 2 | ( | X | × | 4 5 | ) |
| = | 19 5 | X | + | 2 | ( | X | × | 4 5 | ) |
| = | 19 5 | X | + | 2 | X | × | 4 5 |
| = | 19 5 | X | + | 8 5 | X |
| = | 27 5 | X |
27 5 | X | = | 18256 |
| X | = | 18256 | ÷ | 27 5 |
| = | 18256 | × | 5 27 |
| X | = | 91280 27 |
| X | = | 3380.740741 |