| ( | 11000 | × | 12 | × | 9 10 | − | 109 | X | × | 70 100 | × | 32 500 | ) | ÷ | ( | 109 | X | × | 30 100 | + | 109 | X | × | 5 100 | ) | = | 18 500 |
| 方程两边同时乘以: | ( | 109 | X | × | 30 100 | + | 109 | X | × | 5 100 | ) |
| ( | 11000 | × | 12 | × | 9 10 | − | 109 | X | × | 70 100 | × | 32 500 | ) | = | 18 500 | ( | 109 | X | × | 30 100 | + | 109 | X | × | 5 100 | ) |
| 11000 | × | 12 | × | 9 10 | − | 109 | X | × | 70 100 | × | 32 500 | = | 18 500 | ( | 109 | X | × | 30 100 | + | 109 | X | × | 5 100 | ) |
| 11000 | × | 12 | × | 9 10 | − | 109 | X | × | 70 100 | × | 32 500 | = | 18 500 | × | 109 | X | × | 30 100 | + | 18 500 | × | 109 | X | × | 5 100 |
| 118800 | − | 3052 625 | X | = | 2943 2500 | X | + | 981 5000 | X |
| 118800 | − | 3052 625 | X | = | 6867 5000 | X |
| - | 3052 625 | X | − | 6867 5000 | X | = | - | 118800 |
| - | 31283 5000 | X | = | - | 118800 |
| 118800 | = | 31283 5000 | X |
31283 5000 | X | = | 118800 |
| X | = | 118800 | ÷ | 31283 5000 |
| = | 118800 | × | 5000 31283 |
| X | = | 594000000 31283 |
| X | = | 18987.948726 |