| 169 | + | x | = | 731 1000 | ( | 239 | + | x | ) |
| 方程右边 = | 731 1000 | × | 239 | + | 731 1000 | x |
| = | 174709 1000 | + | 731 1000 | x |
| 169 | + | x | = | 174709 1000 | + | 731 1000 | x |
| x | − | 731 1000 | x | = | 174709 1000 | − | 169 |
269 1000 | x | = | 174709 1000 | − | 169 |
269 1000 | x | = | 5709 1000 |
| x | = | 5709 1000 | ÷ | 269 1000 |
| = | 5709 1000 | × | 1000 269 |
| = | 5709 | × | 1 269 |
| x | = | 5709 269 |
| x | = | 21.223048 |