| ( | 13163 500 | + | x | ) | × | 51 20 | = | 13163 250 | + | 35389 500 | − | x |
| 方程左边 = | 13163 500 | × | 51 20 | + | x | × | 51 20 |
| = | 671313 10000 | + | x | × | 51 20 |
671313 10000 | + | 51 20 | x | = | 13163 250 | + | 35389 500 | − | x |
| 方程右边 = | 12343 100 | − | x |
671313 10000 | + | 51 20 | x | = | 12343 100 | − | x |
51 20 | x | + | x | = | 12343 100 | − | 671313 10000 |
71 20 | x | = | 12343 100 | − | 671313 10000 |
71 20 | x | = | 562987 10000 |
| x | = | 562987 10000 | ÷ | 71 20 |
| = | 562987 10000 | × | 20 71 |
| = | 562987 500 | × | 1 71 |
| x | = | 562987 35500 |
| x | = | 15.858789 |