| 5 | ( | 1 | + | X | ) | + | 4 | × | 1 | + | 1 | × | 1 | = | 22 5 | ( | X | + | 3 | ) |
| 方程左边 = | 5 | ( | 1 | + | X | ) | + | 4 | + | 1 |
| = | 5 | ( | 1 | + | X | ) | + | 5 |
| 5 | ( | 1 | + | X | ) | + | 5 | = | 22 5 | ( | X | + | 3 | ) |
| 方程左边 = | 5 | × | 1 | + | 5 | X | + | 5 |
| = | 5 | + | 5 | X | + | 5 |
| = | 10 | + | 5 | X |
| 10 | + | 5 | X | = | 22 5 | ( | X | + | 3 | ) |
| 方程右边 = | 22 5 | X | + | 22 5 | × | 3 |
| = | 22 5 | X | + | 66 5 |
| 10 | + | 5 | X | = | 22 5 | X | + | 66 5 |
| 5 | X | − | 22 5 | X | = | 66 5 | − | 10 |
3 5 | X | = | 66 5 | − | 10 |
3 5 | X | = | 16 5 |
| X | = | 16 5 | ÷ | 3 5 |
| = | 16 5 | × | 5 3 |
| = | 16 | × | 1 3 |
| X | = | 16 3 |
| X | = | 5.333333 |