| 36 | ( | 10 | + | x | ) | − | 4 | ( | 10 | + | x | ) | = | 360 |
| 方程左边 = | 36 | × | 10 | + | 36 | x | − | 4 | ( | 10 | + | x | ) |
| = | 360 | + | 36 | x | − | 4 | ( | 10 | + | x | ) |
| = | 360 | + | 36 | x | − | 4 | × | 10 | − | 4 | x |
| = | 360 | + | 36 | x | − | 40 | − | 4 | x |
| = | 320 | + | 32 | x |
| 320 | + | 32 | x | = | 360 |
| 32 | x | = | 360 | − | 320 |
| 32 | x | = | 40 |
| x | = | 40 | ÷ | 32 |
| = | 40 | × | 1 32 |
| = | 5 | × | 1 4 |
| x | = | 5 4 |
| x | = | 1.25 |