507 1000 | ( | 50 | + | 13 2 | X | ) | = | 493 1000 | ( | 40 | + | 17 2 | X | ) |
| 方程左边 = | 507 1000 | × | 50 | + | 507 1000 | × | 13 2 | X |
| = | 507 20 | + | 6591 2000 | X |
507 20 | + | 6591 2000 | X | = | 493 1000 | ( | 40 | + | 17 2 | X | ) |
| 方程右边 = | 493 1000 | × | 40 | + | 493 1000 | × | 17 2 | X |
| = | 493 25 | + | 8381 2000 | X |
507 20 | + | 6591 2000 | X | = | 493 25 | + | 8381 2000 | X |
6591 2000 | X | − | 8381 2000 | X | = | 493 25 | − | 507 20 |
| - | 179 200 | X | = | 493 25 | − | 507 20 |
| - | 179 200 | X | = | - | 563 100 |
563 100 | = | 179 200 | X |
179 200 | X | = | 563 100 |
| X | = | 563 100 | ÷ | 179 200 |
| = | 563 100 | × | 200 179 |
| = | 563 | × | 2 179 |
| X | = | 1126 179 |
| X | = | 6.290503 |