| 10 | ÷ | 4457 50 | + | 6 | ÷ | 447 10 | + | 8 | ÷ | 451 10 | + | X | ÷ | 1000 | + | ( | 331 5 | − | X | ) | ÷ | 200 | = | 3 5 |
| 方程左边 = | 500 4457 | + | 20 149 | + | 80 451 | + | X | × | 1 1000 | + | ( | 331 5 | − | X | ) | × | 1 200 |
| = | 126929080 299505943 | + | 1 1000 | X | + | ( | 331 5 | − | X | ) | × | 1 200 |
126929080 299505943 | + | 1 1000 | X | + | ( | 331 5 | − | X | ) | × | 1 200 | = | 3 5 |
| 方程左边 = | 126929080 299505943 | + | 1 1000 | X | + | 331 5 | × | 1 200 | − | X | × | 1 200 |
| = | 126929080 299505943 | + | 1 1000 | X | + | 331 1000 | − | X | × | 1 200 |