| ( | x | × | 155 | + | 35 | × | 41 | ) | ÷ | ( | 155 | + | 35 | ) | = | 25 |
| 方程两边同时乘以: | ( | 155 | + | 35 | ) |
| ( | x | × | 155 | + | 35 | × | 41 | ) | = | 25 | ( | 155 | + | 35 | ) |
| x | × | 155 | + | 35 | × | 41 | = | 25 | ( | 155 | + | 35 | ) |
| x | × | 155 | + | 35 | × | 41 | = | 25 | × | 155 | + | 25 | × | 35 |
| x | × | 155 | + | 1435 | = | 3875 | + | 875 |
| 155 | x | + | 1435 | = | 4750 |
| 155 | x | = | 4750 | − | 1435 |
| 155 | x | = | 3315 |
| x | = | 3315 | ÷ | 155 |
| = | 3315 | × | 1 155 |
| = | 663 | × | 1 31 |
| x | = | 663 31 |
| x | = | 21.387097 |