| ( | X | + | 1 2 | ) | × | 6 5 | × | 3 50 | = | 63 100 |
| 方程左边 = | ( | X | + | 1 2 | ) | × | 9 125 |
| ( | X | + | 1 2 | ) | × | 9 125 | = | 63 100 |
| 方程左边 = | X | × | 9 125 | + | 1 2 | × | 9 125 |
| = | X | × | 9 125 | + | 9 250 |
9 125 | X | + | 9 250 | = | 63 100 |
9 125 | X | = | 63 100 | − | 9 250 |
9 125 | X | = | 297 500 |
| X | = | 297 500 | ÷ | 9 125 |
| = | 297 500 | × | 125 9 |
| = | 33 4 | × | 1 |
| X | = | 33 4 |
| X | = | 8.25 |