| 75 | x | ÷ | ( | 75 | + | 100 | x | ) | = | 529 1000 |
| 方程两边同时乘以: | ( | 75 | + | 100 | x | ) |
| 75 | x | = | 529 1000 | ( | 75 | + | 100 | x | ) |
| 75 | x | = | 529 1000 | × | 75 | + | 529 1000 | × | 100 | x |
| 75 | x | = | 1587 40 | + | 529 10 | x |
| 75 | x | − | 529 10 | x | = | 1587 40 |
221 10 | x | = | 1587 40 |
| x | = | 1587 40 | ÷ | 221 10 |
| = | 1587 40 | × | 10 221 |
| = | 1587 4 | × | 1 221 |
| x | = | 1587 884 |
| x | = | 1.795249 |