| 10 | ÷ | 4457 50 | + | X | ÷ | 200 | + | ( | 386 5 | − | X | ) | ÷ | 255 2 | = | 3 5 |
| 方程左边 = | 500 4457 | + | X | × | 1 200 | + | ( | 386 5 | − | X | ) | × | 2 255 |
500 4457 | + | 1 200 | X | + | ( | 386 5 | − | X | ) | × | 2 255 | = | 3 5 |
| 方程左边 = | 500 4457 | + | 1 200 | X | + | 386 5 | × | 2 255 | − | X | × | 2 255 |
| = | 500 4457 | + | 1 200 | X | + | 772 1275 | − | X | × | 2 255 |
| = | 4078304 5682675 | − | 29 10200 | X |
4078304 5682675 | − | 29 10200 | X | = | 3 5 |
| - | 29 10200 | X | = | 3 5 | − | 4078304 5682675 |
| - | 29 10200 | X | = | - | 668699 5682675 |
668699 5682675 | = | 29 10200 | X |
29 10200 | X | = | 668699 5682675 |
| X | = | 668699 5682675 | ÷ | 29 10200 |
| = | 668699 5682675 | × | 10200 29 |
| = | 668699 75769 | × | 136 29 |
| X | = | 90943064 2197301 |
| X | = | 5349592 129253 |
| X | = | 41.388533 |