| x | − | 1 5 | x | − | 1 20 | x | − | 3 | = | 659 100 | + | 1 5 | × | 100 |
| 方程左边 = | 3 4 | x | − | 3 |
3 4 | x | − | 3 | = | 659 100 | + | 1 5 | × | 100 |
| 方程右边 = | 659 100 | + | 20 |
| = | 2659 100 |
3 4 | x | − | 3 | = | 2659 100 |
3 4 | x | = | 2659 100 | + | 3 |
3 4 | x | = | 2959 100 |
| x | = | 2959 100 | ÷ | 3 4 |
| = | 2959 100 | × | 4 3 |
| = | 2959 25 | × | 1 3 |
| x | = | 2959 75 |
| x | = | 39.453333 |