| ( | 350 | ÷ | 21 20 | × | 123 250 | ) | + | 97 100 | X | = | ( | 350 | + | X | ) | ÷ | 21 20 | × | 251 5 |
| 方程左边 = | 350 | ÷ | 21 20 | × | 123 250 | + | 97 100 | X |
| = | 164 | + | 97 100 | X |
| 164 | + | 97 100 | X | = | ( | 350 | + | X | ) | ÷ | 21 20 | × | 251 5 |
| 方程右边 = | ( | 350 | + | X | ) | × | 1004 21 |
| 164 | + | 97 100 | X | = | ( | 350 | + | X | ) | × | 1004 21 |
| 方程右边 = | 350 | × | 1004 21 | + | X | × | 1004 21 |
| = | 50200 3 | + | X | × | 1004 21 |
| 164 | + | 97 100 | X | = | 50200 3 | + | 1004 21 | X |
97 100 | X | − | 1004 21 | X | = | 50200 3 | − | 164 |
| - | 98363 2100 | X | = | 50200 3 | − | 164 |
| - | 98363 2100 | X | = | 49708 3 |
| - | 49708 3 | = | 98363 2100 | X |
98363 2100 | X | = | - | 49708 3 |
| X | = | - | 49708 3 | ÷ | 98363 2100 |
| = | - | 49708 3 | × | 2100 98363 |
| = | - | 49708 | × | 700 98363 |
| X | = | - | 34795600 98363 |
| X | = | - 353.746836 |