| ( | 8456 | + | 39 2 | + | 50 | + | X | ) | × | 3 1000 | = | 4 | X |
| 方程左边 = | 8456 | × | 3 1000 | + | 39 2 | × | 3 1000 | + | 50 | × | 3 1000 | + | X | × | 3 1000 |
| = | 3171 125 | + | 117 2000 | + | 3 20 | + | X | × | 3 1000 |
| = | 51153 2000 | + | 3 1000 | X |
51153 2000 | + | 3 1000 | X | = | 4 | X |
3 1000 | X | − | 4 | X | = | - | 51153 2000 |
| - | 3997 1000 | X | = | - | 51153 2000 |
51153 2000 | = | 3997 1000 | X |
3997 1000 | X | = | 51153 2000 |
| X | = | 51153 2000 | ÷ | 3997 1000 |
| = | 51153 2000 | × | 1000 3997 |
| = | 51153 2 | × | 1 3997 |
| X | = | 51153 7994 |
| X | = | 6.398924 |