| ( | 1 | + | 3 | ÷ | 4 | ) | x | + | ( | 56 | − | x | ) | ( | 1 | − | 3 | ÷ | 8 | ) | = | 53 |
| 方程左边 = | 1 | x | + | 3 | ÷ | 4 | × | x | + | ( | 56 | − | x | ) | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 1 | x | + | 3 4 | x | + | ( | 56 | − | x | ) | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | ( | 56 | − | x | ) | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | 56 | ( | 1 | − | 3 | ÷ | 8 | ) | − | x | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | 56 | × | 1 | − | 56 | × | 3 | ÷ | 8 | − | x | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | 56 | − | 21 | − | x | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | 35 | − | x | ( | 1 | − | 3 | ÷ | 8 | ) |
| = | 7 4 | x | + | 35 | − | x | × | 1 | + | x | × | 3 | ÷ | 8 |
| = | 7 4 | x | + | 35 | − | x | × | 1 | + | x | × | 3 8 |
| = | 9 8 | x | + | 35 |
9 8 | x | + | 35 | = | 53 |
9 8 | x | = | 53 | − | 35 |
9 8 | x | = | 18 |
| x | = | 18 | ÷ | 9 8 |
| = | 18 | × | 8 9 |
| = | 2 | × | 8 |
| x | = | 16 |