| ( | 2500 | × | 12 | × | 9 10 | − | 7 10 | × | 379 5 | X | × | 8 125 | ) | ÷ | ( | 3 10 | × | 379 5 | X | + | 1 20 | × | 379 5 | X | ) | = | 0 |
| 方程两边同时乘以: | ( | 3 10 | × | 379 5 | X | + | 1 20 | × | 379 5 | X | ) |
| ( | 2500 | × | 12 | × | 9 10 | − | 7 10 | × | 379 5 | X | × | 8 125 | ) | = | 0 |
| 2500 | × | 12 | × | 9 10 | − | 7 10 | × | 379 5 | X | × | 8 125 | = | 0 |
| 27000 | − | 10612 3125 | X | = | 0 |
| - | 10612 3125 | X | = | 0 | − | 27000 |
| - | 10612 3125 | X | = | - | 27000 |
| 27000 | = | 10612 3125 | X |
10612 3125 | X | = | 27000 |
| X | = | 27000 | ÷ | 10612 3125 |
| = | 27000 | × | 3125 10612 |
| = | 6750 | × | 3125 2653 |
| X | = | 21093750 2653 |
| X | = | 7950.904636 |