13 10 | x | × | 2 | ÷ | 3 | + | ( | 13 10 | x | × | 7 10 | ) | × | 1 | ÷ | 3 | − | x | = | 1020 |
| 方程左边 = | 13 15 | x | + | ( | 13 10 | x | × | 7 10 | ) | × | 1 3 | − | x |
| = | - | 2 15 | x | + | ( | 13 10 | x | × | 7 10 | ) | × | 1 3 |
| - | 2 15 | x | + | ( | 13 10 | x | × | 7 10 | ) | × | 1 3 | = | 1020 |
| 方程左边 = | - | 2 15 | x | + | 13 10 | x | × | 7 10 | × | 1 3 |
| = | - | 2 15 | x | + | 91 300 | x |
| = | 17 100 | x |
17 100 | x | = | 1020 |
| x | = | 1020 | ÷ | 17 100 |
| = | 1020 | × | 100 17 |
| = | 60 | × | 100 |
| x | = | 6000 |