| 1640 | × | 150 | ( | X | − | 75 | ) | + | 160 | X | X | × | 1 2 | = | 66667 10000 | × | 9161 | ( | 1636 | − | X | ) |
| 方程左边 = | 246000 | ( | X | − | 75 | ) | + | 80 | X | X |
| 246000 | ( | X | − | 75 | ) | + | 80 | X | X | = | 66667 10000 | × | 9161 | ( | 1636 | − | X | ) |
| 方程左边 = | 246000 | X | − | 246000 | × | 75 | + | 80 | X | X |
| = | 246000 | X | − | 18450000 | + | 80 | X | X |
| 246000 | X | − | 18450000 | + | 80 | X | X | = | 66667 10000 | × | 9161 | ( | 1636 | − | X | ) |
| 方程右边 = | 610736387 10000 | ( | 1636 | − | X | ) |
| 246000 | X | − | 18450000 | + | 80 | X | X | = | 610736387 10000 | ( | 1636 | − | X | ) |
| 方程右边 = | 610736387 10000 | × | 1636 | − | 610736387 10000 | X |