| x | − | ( | x | × | 4 5 | ) | − | ( | x | × | 17 20 | ) | − | 10 | = | 298 |
| 方程左边 = | x | − | x | × | 4 5 | − | ( | x | × | 17 20 | ) | − | 10 |
| = | 1 5 | x | − | ( | x | × | 17 20 | ) | − | 10 |
| = | 1 5 | x | − | x | × | 17 20 | − | 10 |
| = | - | 13 20 | x | − | 10 |
| - | 13 20 | x | − | 10 | = | 298 |
| - | 13 20 | x | = | 298 | + | 10 |
| - | 13 20 | x | = | 308 |
| - | 308 | = | 13 20 | x |
13 20 | x | = | - | 308 |
| x | = | - | 308 | ÷ | 13 20 |
| = | - | 308 | × | 20 13 |
| x | = | - | 6160 13 |
| x | = | - 473.846154 |