| 632 | ÷ | ( | x | + | 141 20 | ) | = | 85 | ÷ | x | × | 4 5 |
| 方程两边同时乘以: | ( | x | + | 141 20 | ) | , | x |
| 632 | x | = | 85 | × | 4 5 | ( | x | + | 141 20 | ) |
| 632 | x | = | 85 | × | 4 5 | x | + | 85 | × | 4 5 | × | 141 20 |
| 632 | x | = | 68 | x | + | 2397 5 |
| 632 | x | − | 68 | x | = | 2397 5 |
| 564 | x | = | 2397 5 |
| x | = | 2397 5 | ÷ | 564 |
| = | 2397 5 | × | 1 564 |
| = | 799 5 | × | 1 188 |
| x | = | 799 940 |
| x | = | 17 20 |
| x | = | 0.85 |