| ( | x | − | 10 | ) | ÷ | 1000 | + | x | ÷ | 2000 | + | ( | x | + | 10 | ) | ÷ | 3000 | = | 12 |
| 方程左边 = | x | × | 1 1000 | − | 10 | × | 1 1000 | + | 1 2000 | x | + | ( | x | + | 10 | ) | × | 1 3000 |
| = | x | × | 1 1000 | − | 1 100 | + | 1 2000 | x | + | ( | x | + | 10 | ) | × | 1 3000 |
| = | 3 2000 | x | − | 1 100 | + | ( | x | + | 10 | ) | × | 1 3000 |
| = | 3 2000 | x | − | 1 100 | + | x | × | 1 3000 | + | 10 | × | 1 3000 |
| = | 3 2000 | x | − | 1 100 | + | x | × | 1 3000 | + | 1 300 |
| = | 11 6000 | x | − | 1 150 |
11 6000 | x | − | 1 150 | = | 12 |
11 6000 | x | = | 12 | + | 1 150 |
11 6000 | x | = | 1801 150 |
| x | = | 1801 150 | ÷ | 11 6000 |
| = | 1801 150 | × | 6000 11 |
| = | 1801 | × | 40 11 |
| x | = | 72040 11 |
| x | = | 6549.090909 |