| ( | 8456 | + | 39 2 | + | 50 | + | X | ) | × | 7 200 | = | 4 | X |
| 方程左边 = | 8456 | × | 7 200 | + | 39 2 | × | 7 200 | + | 50 | × | 7 200 | + | X | × | 7 200 |
| = | 7399 25 | + | 273 400 | + | 7 4 | + | X | × | 7 200 |
| = | 119357 400 | + | 7 200 | X |
119357 400 | + | 7 200 | X | = | 4 | X |
7 200 | X | − | 4 | X | = | - | 119357 400 |
| - | 793 200 | X | = | - | 119357 400 |
119357 400 | = | 793 200 | X |
793 200 | X | = | 119357 400 |
| X | = | 119357 400 | ÷ | 793 200 |
| = | 119357 400 | × | 200 793 |
| = | 119357 2 | × | 1 793 |
| X | = | 119357 1586 |
| X | = | 75.25662 |