| x | x | + | ( | 4 | ÷ | 3 | × | x | + | 12 | ) | ( | 4 | ÷ | 3 | × | x | + | 12 | ) | = | 48 | × | 48 | ÷ | 25 |
| 方程左边 = | x | x | + | 4 | ÷ | 3 | × | x | ( | 4 | ÷ | 3 | × | x | + | 12 | ) | + | 12 | ( | 4 | ÷ | 3 | × | x | + | 12 | ) |
| = | x | x | + | 4 3 | x | ( | 4 | ÷ | 3 | × | x | + | 12 | ) | + | 12 | ( | 4 | ÷ | 3 | × | x | + | 12 | ) |
| = | x | x | + | 4 3 | x | × | 4 | ÷ | 3 | × | x | + | 4 3 | x | × | 12 | + | 12 | ( | 4 | ÷ | 3 | × | x | + | 12 | ) |
| = | x | x | + | 16 9 | x | x | + | 16 | x | + | 12 | ( | 4 | ÷ | 3 | × | x | + | 12 | ) |
| = | x | x | + | 16 9 | x | x | + | 16 | x | + | 12 | × | 4 | ÷ | 3 | × | x | + | 12 |
| = | x | x | + | 16 9 | x | x | + | 16 | x | + | 16 | x | + | 144 |
| = | x | x | + | 16 9 | x | x | + | 32 | x | + | 144 |
| x | x | + | 16 9 | x | x | + | 32 | x | + | 144 | = | 48 | × | 48 | ÷ | 25 |
| 方程右边 = | 2304 25 |
| x | x | + | 16 9 | x | x | + | 32 | x | + | 144 | = | 2304 25 |