| ( | 945 | + | X | ) | ÷ | 2 | × | 8914 | = | 12000 |
| 方程左边 = | ( | 945 | + | X | ) | × | 4457 |
| ( | 945 | + | X | ) | × | 4457 | = | 12000 |
| 方程左边 = | 945 | × | 4457 | + | X | × | 4457 |
| = | 4211865 | + | X | × | 4457 |
| 4211865 | + | 4457 | X | = | 12000 |
| 4457 | X | = | 12000 | − | 4211865 |
| 4457 | X | = | - | 4199865 |
| X | = | - | 4199865 | ÷ | 4457 |
| = | - | 4199865 | × | 1 4457 |
| X | = | - | 4199865 4457 |
| X | = | - 942.307606 |