| x | ( | 1 | + | 18 100 | ) | ( | 1 | + | 5 100 | ) | + | 38 | + | 139 5 | = | 20682 25 |
| 方程左边 = | x | ( | 1 | + | 18 100 | ) | ( | 1 | + | 5 100 | ) | + | 329 5 |
| x | ( | 1 | + | 18 100 | ) | ( | 1 | + | 5 100 | ) | + | 329 5 | = | 20682 25 |
| 方程左边 = | x | × | 1 | ( | 1 | + | 5 100 | ) | + | x | × | 18 100 | ( | 1 | + | 5 100 | ) | + | 329 5 |
| = | x | × | 1 | × | 1 | + | x | × | 1 | × | 5 100 | + | x | × | 18 100 | ( | 1 | + | 5 100 | ) | + | 329 5 |
| = | x | × | 1 | + | x | × | 1 20 | + | x | × | 18 100 | ( | 1 | + | 5 100 | ) | + | 329 5 |
| = | 21 20 | x | + | x | × | 18 100 | ( | 1 | + | 5 100 | ) | + | 329 5 |
| = | 21 20 | x | + | x | × | 18 100 | × | 1 | + | x | × | 18 100 | × | 5 100 | + | 329 5 |
| = | 21 20 | x | + | x | × | 9 50 | + | x | × | 9 1000 | + | 329 5 |
| = | 1239 1000 | x | + | 329 5 |
1239 1000 | x | + | 329 5 | = | 20682 25 |
1239 1000 | x | = | 20682 25 | − | 329 5 |
1239 1000 | x | = | 19037 25 |
| x | = | 19037 25 | ÷ | 1239 1000 |
| = | 19037 25 | × | 1000 1239 |
| = | 19037 | × | 40 1239 |
| x | = | 761480 1239 |
| x | = | 614.592413 |