| 1 | × | 2 | + | 2 | × | 0 | + | 3 | × | 0 | + | 4 | × | 3 | + | 5 | ( | 5 | + | X | ) | = | 43 10 | ( | 10 | + | X | ) |
| 方程左边 = | 2 | + | 0 | + | 0 | + | 12 | + | 5 | ( | 5 | + | X | ) |
| = | 14 | + | 5 | ( | 5 | + | X | ) |
| 14 | + | 5 | ( | 5 | + | X | ) | = | 43 10 | ( | 10 | + | X | ) |
| 方程左边 = | 14 | + | 5 | × | 5 | + | 5 | X |
| = | 14 | + | 25 | + | 5 | X |
| = | 39 | + | 5 | X |
| 39 | + | 5 | X | = | 43 10 | ( | 10 | + | X | ) |
| 方程右边 = | 43 10 | × | 10 | + | 43 10 | X |
| = | 43 | + | 43 10 | X |
| 39 | + | 5 | X | = | 43 | + | 43 10 | X |
| 5 | X | − | 43 10 | X | = | 43 | − | 39 |
7 10 | X | = | 43 | − | 39 |
7 10 | X | = | 4 |
| X | = | 4 | ÷ | 7 10 |
| = | 4 | × | 10 7 |
| X | = | 40 7 |
| X | = | 5.714286 |