| X | ÷ | 136 | − | 100 | ÷ | 447 10 | − | 480 | ÷ | 500 | − | 12 25 | − | 240 | ÷ | 1650 | = | 7 2500 | ( | 1300 | + | X | ) |
| 方程左边 = | X | × | 1 136 | − | 1000 447 | − | 24 25 | − | 12 25 | − | 8 55 |
| = | 1 136 | X | − | 469892 122925 |
1 136 | X | − | 469892 122925 | = | 7 2500 | ( | 1300 | + | X | ) |
| 方程右边 = | 7 2500 | × | 1300 | + | 7 2500 | X |
| = | 91 25 | + | 7 2500 | X |
1 136 | X | − | 469892 122925 | = | 91 25 | + | 7 2500 | X |
1 136 | X | − | 7 2500 | X | = | 91 25 | + | 469892 122925 |
387 85000 | X | = | 91 25 | + | 469892 122925 |
387 85000 | X | = | 917339 122925 |
| X | = | 917339 122925 | ÷ | 387 85000 |
| = | 917339 122925 | × | 85000 387 |
| = | 917339 4917 | × | 3400 387 |
| X | = | 3118952600 1902879 |
| X | = | 1639.070377 |