| X | = | 6 5 | ( | 200 | ÷ | 60 | ) | × | 2 | ÷ | ( | 2 | ( | 157 50 | × | 21 50 | ) | × | 2 | ) |
| 方程两边同时乘以: | ( | 2 | ( | 157 50 | × | 21 50 | ) | × | 2 | ) |
| X | ( | 2 | ( | 157 50 | × | 21 50 | ) | × | 2 | ) | = | 6 5 | ( | 200 | ÷ | 60 | ) | × | 2 |
| X | × | 2 | ( | 157 50 | × | 21 50 | ) | × | 2 | = | 6 5 | ( | 200 | ÷ | 60 | ) | × | 2 |
| X | × | 2 | ( | 157 50 | × | 21 50 | ) | × | 2 | = | 6 5 | × | 200 | ÷ | 60 | × | 2 |
| X | × | 4 | ( | 157 50 | × | 21 50 | ) | = | 8 |
| X | × | 4 | × | 157 50 | × | 21 50 | = | 8 |
| X | × | 3297 625 | = | 8 |
| X | = | 8 | ÷ | 3297 625 |
| = | 8 | × | 625 3297 |
| X | = | 5000 3297 |
| X | = | 1.51653 |