| ( | 84 5 | + | X | ) | ( | 48 5 | + | X | ) | X | = | 11021 100 |
| 方程左边 = | 84 5 | ( | 48 5 | + | X | ) | X | + | X | ( | 48 5 | + | X | ) | X |
| = | 84 5 | × | 48 5 | X | + | 84 5 | X | X | + | X | ( | 48 5 | + | X | ) | X |
| = | 4032 25 | X | + | 84 5 | X | X | + | X | ( | 48 5 | + | X | ) | X |
| = | 4032 25 | X | + | 84 5 | X | X | + | X | × | 48 5 | X | + | X | X | X |
4032 25 | X | + | 84 5 | X | X | + | X | × | 48 5 | X | + | X | X | X | = | 11021 100 |