| ( | 4950 | + | X | ) | × | 3 100 | = | X |
| 方程左边 = | 4950 | × | 3 100 | + | X | × | 3 100 |
| = | 297 2 | + | X | × | 3 100 |
297 2 | + | 3 100 | X | = | X |
3 100 | X | − | X | = | - | 297 2 |
| - | 97 100 | X | = | - | 297 2 |
297 2 | = | 97 100 | X |
97 100 | X | = | 297 2 |
| X | = | 297 2 | ÷ | 97 100 |
| = | 297 2 | × | 100 97 |
| = | 297 | × | 50 97 |
| X | = | 14850 97 |
| X | = | 153.092784 |