| 390 | × | 96 | ÷ | 108 | × | ( | 150 | − | x | ) | = | ( | 47 5 | + | 13 250 | ( | x | − | 10 | ) | ) | ( | x | − | 10 | ) |
| 方程左边 = | 1040 3 | ( | 150 | − | x | ) |
1040 3 | ( | 150 | − | x | ) | = | ( | 47 5 | + | 13 250 | ( | x | − | 10 | ) | ) | ( | x | − | 10 | ) |
| 方程左边 = | 1040 3 | × | 150 | − | 1040 3 | x |
| = | 52000 | − | 1040 3 | x |
| 52000 | − | 1040 3 | x | = | ( | 47 5 | + | 13 250 | ( | x | − | 10 | ) | ) | ( | x | − | 10 | ) |
| 方程右边 = | 47 5 | ( | x | − | 10 | ) | + | 13 250 | ( | x | − | 10 | ) | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 47 5 | × | 10 | + | 13 250 | ( | x | − | 10 | ) | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 94 | + | 13 250 | ( | x | − | 10 | ) | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 94 | + | 13 250 | x | ( | x | − | 10 | ) | − | 13 250 | × | 10 | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 94 | + | 13 250 | x | ( | x | − | 10 | ) | − | 13 25 | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 94 | + | 13 250 | x | x | − | 13 250 | x | × | 10 | − | 13 25 | ( | x | − | 10 | ) |
| = | 47 5 | x | − | 94 | + | 13 250 | x | x | − | 13 25 | x | − | 13 25 | ( | x | − | 10 | ) |
| = | 222 25 | x | − | 94 | + | 13 250 | x | x | − | 13 25 | ( | x | − | 10 | ) |
| = | 222 25 | x | − | 94 | + | 13 250 | x | x | − | 13 25 | x | + | 13 25 | × | 10 |
| = | 222 25 | x | − | 94 | + | 13 250 | x | x | − | 13 25 | x | + | 26 5 |
| = | 209 25 | x | − | 444 5 | + | 13 250 | x | x |
| 52000 | − | 1040 3 | x | = | 209 25 | x | − | 444 5 | + | 13 250 | x | x |