9 2 | = | ( | x | × | 5 | + | 150 | × | 39 10 | ) | ÷ | ( | x | + | 150 | ) |
| 方程两边同时乘以: | ( | x | + | 150 | ) |
9 2 | ( | x | + | 150 | ) | = | ( | x | × | 5 | + | 150 | × | 39 10 | ) |
9 2 | x | + | 9 2 | × | 150 | = | ( | x | × | 5 | + | 150 | × | 39 10 | ) |
9 2 | x | + | 9 2 | × | 150 | = | x | × | 5 | + | 150 | × | 39 10 |
9 2 | x | + | 675 | = | x | × | 5 | + | 585 |
9 2 | x | − | 5 | x | = | 585 | − | 675 |
| - | 1 2 | x | = | 585 | − | 675 |
| - | 1 2 | x | = | - | 90 |
| 90 | = | 1 2 | x |
1 2 | x | = | 90 |
| x | = | 90 | ÷ | 1 2 |
| = | 90 | × | 2 |
| x | = | 180 |