| 14 | × | 8 500 | + | 7 1000 | X | + | 7 2000 | × | 110 | = | 7 2000 | X | + | 40 100 | × | 2 100 | ( | X | − | 110 | ) |
| 方程左边 = | 28 125 | + | 7 1000 | X | + | 77 200 |
| = | 609 1000 | + | 7 1000 | X |
609 1000 | + | 7 1000 | X | = | 7 2000 | X | + | 40 100 | × | 2 100 | ( | X | − | 110 | ) |
| 方程右边 = | 7 2000 | X | + | 1 125 | ( | X | − | 110 | ) |
609 1000 | + | 7 1000 | X | = | 7 2000 | X | + | 1 125 | ( | X | − | 110 | ) |
| 方程右边 = | 7 2000 | X | + | 1 125 | X | − | 1 125 | × | 110 |
| = | 7 2000 | X | + | 1 125 | X | − | 22 25 |
| = | 23 2000 | X | − | 22 25 |
609 1000 | + | 7 1000 | X | = | 23 2000 | X | − | 22 25 |
7 1000 | X | − | 23 2000 | X | = | - | 22 25 | − | 609 1000 |
| - | 9 2000 | X | = | - | 22 25 | − | 609 1000 |
| - | 9 2000 | X | = | - | 1489 1000 |
1489 1000 | = | 9 2000 | X |
9 2000 | X | = | 1489 1000 |
| X | = | 1489 1000 | ÷ | 9 2000 |
| = | 1489 1000 | × | 2000 9 |
| = | 1489 | × | 2 9 |
| X | = | 2978 9 |
| X | = | 330.888889 |