| 5 | ( | 1 | + | X | ) | + | 4 | × | 1 | + | 1 | × | 1 | = | 43 10 | ( | X | + | 1 | + | 3 | ) |
| 方程左边 = | 5 | ( | 1 | + | X | ) | + | 4 | + | 1 |
| = | 5 | ( | 1 | + | X | ) | + | 5 |
| 5 | ( | 1 | + | X | ) | + | 5 | = | 43 10 | ( | X | + | 1 | + | 3 | ) |
| 方程左边 = | 5 | × | 1 | + | 5 | X | + | 5 |
| = | 5 | + | 5 | X | + | 5 |
| = | 10 | + | 5 | X |
| 10 | + | 5 | X | = | 43 10 | ( | X | + | 1 | + | 3 | ) |
| 方程右边 = | 43 10 | X | + | 43 10 | × | 1 | + | 43 10 | × | 3 |
| = | 43 10 | X | + | 43 10 | + | 129 10 |
| = | 43 10 | X | + | 86 5 |
| 10 | + | 5 | X | = | 43 10 | X | + | 86 5 |
| 5 | X | − | 43 10 | X | = | 86 5 | − | 10 |
7 10 | X | = | 86 5 | − | 10 |
7 10 | X | = | 36 5 |
| X | = | 36 5 | ÷ | 7 10 |
| = | 36 5 | × | 10 7 |
| = | 36 | × | 2 7 |
| X | = | 72 7 |
| X | = | 10.285714 |