| 16 | ÷ | 102 | + | X | ÷ | 1000 | + | ( | 312 5 | − | X | ) | ÷ | 1650 | + | 4 | ÷ | 447 10 | + | 0 | ÷ | 53 | = | 61 200 |
| 方程左边 = | 8 51 | + | X | × | 1 1000 | + | ( | 312 5 | − | X | ) | × | 1 1650 | + | 40 447 | + | 0 |
| = | 624 2533 | + | 1 1000 | X | + | ( | 312 5 | − | X | ) | × | 1 1650 |
624 2533 | + | 1 1000 | X | + | ( | 312 5 | − | X | ) | × | 1 1650 | = | 61 200 |
| 方程左边 = | 624 2533 | + | 1 1000 | X | + | 312 5 | × | 1 1650 | − | X | × | 1 1650 |
| = | 624 2533 | + | 1 1000 | X | + | 52 1375 | − | X | × | 1 1650 |
| = | 989716 3482875 | + | 13 33000 | X |
989716 3482875 | + | 13 33000 | X | = | 61 200 |
13 33000 | X | = | 61 200 | − | 989716 3482875 |
13 33000 | X | = | 580487 27863000 |
| X | = | 580487 27863000 | ÷ | 13 33000 |
| = | 580487 27863000 | × | 33000 13 |
| = | 580487 2533 | × | 3 13 |
| X | = | 1741461 32929 |
| X | = | 52.885329 |