423 12500 | = | 311 500 | × | 3551 10 | X | ÷ | ( | 760 | − | 3551 10 | X | ) |
| 方程两边同时乘以: | ( | 760 | − | 3551 10 | X | ) |
423 12500 | ( | 760 | − | 3551 10 | X | ) | = | 311 500 | × | 3551 10 | X |
423 12500 | × | 760 | − | 423 12500 | × | 3551 10 | X | = | 311 500 | × | 3551 10 | X |
16074 625 | − | 1502073 125000 | X | = | 1104361 5000 | X |
| - | 1502073 125000 | X | − | 1104361 5000 | X | = | - | 16074 625 |