| ( | 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 115 | X | × | 32 500 | ) | ÷ | ( | 30 100 | × | 115 | X | + | 5 100 | × | 115 | X | ) | = | 27 1000 |
| 方程两边同时乘以: | ( | 30 100 | × | 115 | X | + | 5 100 | × | 115 | X | ) |
| ( | 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 115 | X | × | 32 500 | ) | = | 27 1000 | ( | 30 100 | × | 115 | X | + | 5 100 | × | 115 | X | ) |
| 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 115 | X | × | 32 500 | = | 27 1000 | ( | 30 100 | × | 115 | X | + | 5 100 | × | 115 | X | ) |
| 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 115 | X | × | 32 500 | = | 27 1000 | × | 30 100 | × | 115 | X | + | 27 1000 | × | 5 100 | × | 115 | X |
| 54000 | − | 644 125 | X | = | 1863 2000 | X | + | 621 4000 | X |
| 54000 | − | 644 125 | X | = | 4347 4000 | X |
| - | 644 125 | X | − | 4347 4000 | X | = | - | 54000 |
| - | 4991 800 | X | = | - | 54000 |
| 54000 | = | 4991 800 | X |
4991 800 | X | = | 54000 |
| X | = | 54000 | ÷ | 4991 800 |
| = | 54000 | × | 800 4991 |
| X | = | 43200000 4991 |
| X | = | 8655.580044 |