| 358 | x | + | 407 5 | ( | 1 | − | x | ) | = | 485 |
| 方程左边 = | 358 | x | + | 407 5 | × | 1 | − | 407 5 | x |
| = | 358 | x | + | 407 5 | − | 407 5 | x |
| = | 1383 5 | x | + | 407 5 |
1383 5 | x | + | 407 5 | = | 485 |
1383 5 | x | = | 485 | − | 407 5 |
1383 5 | x | = | 2018 5 |
| x | = | 2018 5 | ÷ | 1383 5 |
| = | 2018 5 | × | 5 1383 |
| = | 2018 | × | 1 1383 |
| x | = | 2018 1383 |
| x | = | 1.459147 |