| 14 | × | 8 500 | + | 7 1000 | X | + | 7 2000 | × | 200 | = | 7 2000 | X | + | 40 100 | × | 2 100 | X |
| 方程左边 = | 28 125 | + | 7 1000 | X | + | 7 10 |
| = | 231 250 | + | 7 1000 | X |
231 250 | + | 7 1000 | X | = | 7 2000 | X | + | 40 100 | × | 2 100 | X |
| 方程右边 = | 7 2000 | X | + | 1 125 | X |
| = | 23 2000 | X |
231 250 | + | 7 1000 | X | = | 23 2000 | X |
7 1000 | X | − | 23 2000 | X | = | - | 231 250 |
| - | 9 2000 | X | = | - | 231 250 |
231 250 | = | 9 2000 | X |
9 2000 | X | = | 231 250 |
| X | = | 231 250 | ÷ | 9 2000 |
| = | 231 250 | × | 2000 9 |
| = | 77 | × | 8 3 |
| X | = | 616 3 |
| X | = | 205.333333 |