| ( | 253 5000 | − | X | ) | ÷ | X | = | 61 1250 |
| 方程两边同时乘以: | X |
| ( | 253 5000 | − | X | ) | = | 61 1250 | X |
253 5000 | − | X | = | 61 1250 | X |
| - | X | − | 61 1250 | X | = | - | 253 5000 |
| - | 1311 1250 | X | = | - | 253 5000 |
253 5000 | = | 1311 1250 | X |
1311 1250 | X | = | 253 5000 |
| X | = | 253 5000 | ÷ | 1311 1250 |
| = | 253 5000 | × | 1250 1311 |
| = | 253 4 | × | 1 1311 |
| X | = | 253 5244 |
| X | = | 11 228 |
| X | = | 0.048246 |