| ( | 74 | ÷ | 7 | × | x | ( | x | − | 1 | ) | × | 23 | ) | × | 3 | ÷ | 4 | × | x | = | x | + | 49 |
| 方程左边 = | ( | 74 | ÷ | 7 | × | x | ( | x | − | 1 | ) | × | 23 | ) | × | 3 4 | x |
| ( | 74 | ÷ | 7 | × | x | ( | x | − | 1 | ) | × | 23 | ) | × | 3 4 | x | = | x | + | 49 |
| 方程左边 = | 74 | ÷ | 7 | × | x | ( | x | − | 1 | ) | × | 23 | × | 3 4 | x |
| = | 2553 14 | x | ( | x | − | 1 | ) | x |
| = | 2553 14 | x | x | x | − | 2553 14 | x | × | 1 | x |
| = | 2553 14 | x | x | x | − | 2553 14 | x | x |
2553 14 | x | x | x | − | 2553 14 | x | x | = | x | + | 49 |