| 20 | ÷ | 102 | + | 1 | ÷ | 89 2 | + | X | ÷ | 500 | + | ( | 303 5 | − | X | ) | ÷ | 1000 | = | 157 500 |
| 方程左边 = | 10 51 | + | 2 89 | + | X | × | 1 500 | + | ( | 303 5 | − | X | ) | × | 1 1000 |
| = | 992 4539 | + | 1 500 | X | + | ( | 303 5 | − | X | ) | × | 1 1000 |
992 4539 | + | 1 500 | X | + | ( | 303 5 | − | X | ) | × | 1 1000 | = | 157 500 |
| 方程左边 = | 992 4539 | + | 1 500 | X | + | 303 5 | × | 1 1000 | − | X | × | 1 1000 |
| = | 992 4539 | + | 1 500 | X | + | 303 5000 | − | X | × | 1 1000 |
| = | 6335317 22695000 | + | 1 1000 | X |
6335317 22695000 | + | 1 1000 | X | = | 157 500 |
1 1000 | X | = | 157 500 | − | 6335317 22695000 |
| X= | √6066421 √4995 |