3 400 | x | + | 333 400 | − | 103 50 | = | 177 4000 | x |
| 方程左边 = | 3 400 | x | − | 491 400 |
3 400 | x | − | 491 400 | = | 177 4000 | x |
3 400 | x | − | 177 4000 | x | = | 491 400 |
| - | 147 4000 | x | = | 491 400 |
| - | 491 400 | = | 147 4000 | x |
147 4000 | x | = | - | 491 400 |
| x | = | - | 491 400 | ÷ | 147 4000 |
| = | - | 491 400 | × | 4000 147 |
| = | - | 491 | × | 10 147 |
| x | = | - | 4910 147 |
| x | = | - 33.401361 |