| x | + | ( | x | + | 10 | ) | + | ( | x | + | 10 | − | 26 | ) | + | ( | x | + | 10 | − | 32 | ) | = | 144 |
| 方程左边 = | x | + | x | + | 10 | + | ( | x | + | 10 | − | 26 | ) | + | ( | x | + | 10 | − | 32 | ) |
| = | 2 | x | + | 10 | + | ( | x | + | 10 | − | 26 | ) | + | ( | x | + | 10 | − | 32 | ) |
| = | 2 | x | + | 10 | + | x | + | 10 | − | 26 | + | ( | x | + | 10 | − | 32 | ) |
| = | 3 | x | − | 6 | + | ( | x | + | 10 | − | 32 | ) |
| = | 3 | x | − | 6 | + | x | + | 10 | − | 32 |
| = | 4 | x | − | 28 |
| 4 | x | − | 28 | = | 144 |
| 4 | x | = | 144 | + | 28 |
| 4 | x | = | 172 |
| x | = | 172 | ÷ | 4 |
| = | 172 | × | 1 4 |
| = | 43 | × | 1 |
| x | = | 43 |