| 50 | × | 801 100 | + | 403 5 | x | = | 653 5 | × | 159 20 |
| 方程左边 = | 801 2 | + | 403 5 | x |
801 2 | + | 403 5 | x | = | 653 5 | × | 159 20 |
| 方程右边 = | 103827 100 |
801 2 | + | 403 5 | x | = | 103827 100 |
403 5 | x | = | 103827 100 | − | 801 2 |
403 5 | x | = | 63777 100 |
| x | = | 63777 100 | ÷ | 403 5 |
| = | 63777 100 | × | 5 403 |
| = | 63777 20 | × | 1 403 |
| x | = | 63777 8060 |
| x | = | 7.912779 |