139 50 | x | ÷ | ( | 1400 | x | ) | = | 8657 100000 |
| 方程两边同时乘以: | ( | 1400 | x | ) |
139 50 | x | = | 8657 100000 | ( | 1400 | x | ) |
139 50 | x | = | 8657 100000 | × | 1400 | x |
139 50 | x | = | 60599 500 | x |
139 50 | x | − | 60599 500 | x | = | 0 |
| - | 59209 500 | x | = | 0 |
| - | 0 | = | 59209 500 | x |
59209 500 | x | = | - | 0 |
| x | = | - | 0 | ÷ | 59209 500 |
| = | - | 0 | × | 500 59209 |
| x | = | 0 |
| x | = | 0 |