| 45 | + | ( | 45 | − | ( | 100 | + | ( | 100 | − | x | + | 26 | ) | ÷ | 3 | ) | + | 26 | ) | ÷ | 3 | = | x |
| 方程左边 = | 45 | + | 45 | × | 1 3 | − | ( | 100 | + | ( | 100 | − | x | + | 26 | ) | ÷ | 3 | ) | × | 1 3 | + | 26 | × | 1 3 |
| = | 45 | + | 15 | − | ( | 100 | + | ( | 100 | − | x | + | 26 | ) | ÷ | 3 | ) | × | 1 3 | + | 26 3 |
| = | 206 3 | − | ( | 100 | + | ( | 100 | − | x | + | 26 | ) | ÷ | 3 | ) | × | 1 3 |
| = | 206 3 | − | 100 | × | 1 3 | − | ( | 100 | − | x | + | 26 | ) | ÷ | 3 | × | 1 3 |
| = | 206 3 | − | 100 3 | − | ( | 100 | − | x | + | 26 | ) | × | 1 9 |
| = | 106 3 | − | ( | 100 | − | x | + | 26 | ) | × | 1 9 |
| = | 106 3 | − | 100 | × | 1 9 | + | x | × | 1 9 | − | 26 | × | 1 9 |
| = | 106 3 | − | 100 9 | + | x | × | 1 9 | − | 26 9 |
| = | 64 3 | + | 1 9 | x |
64 3 | + | 1 9 | x | = | x |
1 9 | x | − | x | = | - | 64 3 |
| - | 8 9 | x | = | - | 64 3 |
64 3 | = | 8 9 | x |
8 9 | x | = | 64 3 |
| x | = | 64 3 | ÷ | 8 9 |
| = | 64 3 | × | 9 8 |
| = | 8 | × | 3 |
| x | = | 24 |