| 17 | ÷ | 104 | + | 25 | ÷ | 1650 | + | X | ÷ | 200 | + | ( | 99 2 | − | X | ) | ÷ | 1000 | + | 3 | ÷ | 50 | = | 61 200 |
| 方程左边 = | 17 104 | + | 1 66 | + | X | × | 1 200 | + | ( | 99 2 | − | X | ) | × | 1 1000 | + | 3 50 |
| = | 20473 85800 | + | 1 200 | X | + | ( | 99 2 | − | X | ) | × | 1 1000 |
20473 85800 | + | 1 200 | X | + | ( | 99 2 | − | X | ) | × | 1 1000 | = | 61 200 |
| 方程左边 = | 20473 85800 | + | 1 200 | X | + | 99 2 | × | 1 1000 | − | X | × | 1 1000 |
| = | 20473 85800 | + | 1 200 | X | + | 99 2000 | − | X | × | 1 1000 |
| = | 247201 858000 | + | 1 250 | X |
247201 858000 | + | 1 250 | X | = | 61 200 |
1 250 | X | = | 61 200 | − | 247201 858000 |
1 250 | X | = | 14489 858000 |
| X | = | 14489 858000 | ÷ | 1 250 |
| = | 14489 858000 | × | 250 |
| = | 14489 3432 | × | 1 |
| X | = | 14489 3432 |
| X | = | 4.221737 |