| 210000 | × | 210000 | ( | 1 | + | X | ) | × | 36 | ÷ | ( | 1 | + | X | ) | × | 35 | = | 8673 |
| 方程两边同时乘以: | ( | 1 | + | X | ) |
| 210000 | × | 210000 | ( | 1 | + | X | ) | × | 36 | × | 35 | = | 8673 | ( | 1 | + | X | ) |
| 210000 | × | 210000 | × | 1 | × | 36 | × | 35 | + | 210000 | × | 210000 | X | × | 36 | × | 35 | = | 8673 | ( | 1 | + | X | ) |
| 210000 | × | 210000 | × | 1 | × | 36 | × | 35 | + | 210000 | × | 210000 | X | × | 36 | × | 35 | = | 8673 | × | 1 | + | 8673 | X |