| x | − | 1 5 | x | − | 1 20 | x | − | 3 | = | 659 100 | + | 1 5 | × | 659 100 |
| 方程左边 = | 3 4 | x | − | 3 |
3 4 | x | − | 3 | = | 659 100 | + | 1 5 | × | 659 100 |
| 方程右边 = | 659 100 | + | 659 500 |
| = | 1977 250 |
3 4 | x | − | 3 | = | 1977 250 |
3 4 | x | = | 1977 250 | + | 3 |
3 4 | x | = | 2727 250 |
| x | = | 2727 250 | ÷ | 3 4 |
| = | 2727 250 | × | 4 3 |
| = | 909 125 | × | 2 |
| x | = | 1818 125 |
| x | = | 14.544 |