| 17 | ÷ | 4457 50 | + | 25 | ÷ | 1650 | + | X | ÷ | 200 | + | ( | 99 2 | − | X | ) | ÷ | 1000 | + | 3 | ÷ | 447 10 | = | 9 25 |
| 方程左边 = | 850 4457 | + | 1 66 | + | X | × | 1 200 | + | ( | 99 2 | − | X | ) | × | 1 1000 | + | 10 149 |
| = | 11964613 43830138 | + | 1 200 | X | + | ( | 99 2 | − | X | ) | × | 1 1000 |
11964613 43830138 | + | 1 200 | X | + | ( | 99 2 | − | X | ) | × | 1 1000 | = | 9 25 |
| 方程左边 = | 11964613 43830138 | + | 1 200 | X | + | 99 2 | × | 1 1000 | − | X | × | 1 1000 |
| = | 11964613 43830138 | + | 1 200 | X | + | 99 2000 | − | X | × | 1 1000 |