| x | ( | 1 | + | 40 100 | ) | × | 4 5 | + | ( | 210 | − | x | ) | ( | 1 | + | 40 100 | ) | × | 9 10 | = | 182 |
| 方程左边 = | x | × | 1 | × | 4 5 | + | x | × | 40 100 | × | 4 5 | + | ( | 210 | − | x | ) | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | x | × | 4 5 | + | x | × | 8 25 | + | ( | 210 | − | x | ) | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | ( | 210 | − | x | ) | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 210 | ( | 1 | + | 40 100 | ) | × | 9 10 | − | x | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 189 | ( | 1 | + | 40 100 | ) | − | x | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 189 | × | 1 | + | 189 | × | 40 100 | − | x | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 189 | + | 378 5 | − | x | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 1323 5 | − | x | ( | 1 | + | 40 100 | ) | × | 9 10 |
| = | 28 25 | x | + | 1323 5 | − | x | × | 1 | × | 9 10 | − | x | × | 40 100 | × | 9 10 |
| = | 28 25 | x | + | 1323 5 | − | x | × | 9 10 | − | x | × | 9 25 |
| = | - | 7 50 | x | + | 1323 5 |
| - | 7 50 | x | + | 1323 5 | = | 182 |
| - | 7 50 | x | = | 182 | − | 1323 5 |
| - | 7 50 | x | = | - | 413 5 |
413 5 | = | 7 50 | x |
7 50 | x | = | 413 5 |
| x | = | 413 5 | ÷ | 7 50 |
| = | 413 5 | × | 50 7 |
| = | 59 | × | 10 |
| x | = | 590 |