| x | ÷ | ( | 1400 | + | x | ) | × | 100 100 | = | 25 100 |
| 方程两边同时乘以: | ( | 1400 | + | x | ) |
| x | × | 100 100 | = | 25 100 | ( | 1400 | + | x | ) |
| x | × | 100 100 | = | 25 100 | × | 1400 | + | 25 100 | x |
| x | × | 100 100 | = | 350 | + | 25 100 | x |
100 100 | x | − | 25 100 | x | = | 350 |
3 4 | x | = | 350 |
| x | = | 350 | ÷ | 3 4 |
| = | 350 | × | 4 3 |
| x | = | 1400 3 |
| x | = | 466.666667 |