| ( | 25697 1000 | + | x | ) | × | 39 20 | = | 51393 1000 | + | 6939 100 | − | x |
| 方程左边 = | 25697 1000 | × | 39 20 | + | x | × | 39 20 |
| = | 1002183 20000 | + | x | × | 39 20 |
1002183 20000 | + | 39 20 | x | = | 51393 1000 | + | 6939 100 | − | x |
| 方程右边 = | 120783 1000 | − | x |
1002183 20000 | + | 39 20 | x | = | 120783 1000 | − | x |
39 20 | x | + | x | = | 120783 1000 | − | 1002183 20000 |
59 20 | x | = | 120783 1000 | − | 1002183 20000 |
59 20 | x | = | 1413477 20000 |
| x | = | 1413477 20000 | ÷ | 59 20 |
| = | 1413477 20000 | × | 20 59 |
| = | 1413477 1000 | × | 1 59 |
| x | = | 1413477 59000 |
| x | = | 23.957237 |