| ( | 8 100 | − | X | ) | ÷ | ( | - | 1267 100 | − | 6 | ) | = | ( | 8 100 | − | 6 100 | ) | ÷ | ( | - | 1267 100 | − | 1049 100 | ) |
| 方程两边同时乘以: | ( | - | 1267 100 | − | 6 | ) | , | ( | - | 1267 100 | − | 1049 100 | ) |
| ( | 8 100 | − | X | ) | ( | - | 1267 100 | − | 1049 100 | ) | = | ( | 8 100 | − | 6 100 | ) | ( | - | 1267 100 | − | 6 | ) |
8 100 | ( | - | 1267 100 | − | 1049 100 | ) | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | ( | 8 100 | − | 6 100 | ) | ( | - | 1267 100 | − | 6 | ) |
8 100 | ( | - | 1267 100 | − | 1049 100 | ) | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | 8 100 | ( | - | 1267 100 | − | 6 | ) | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 8 100 | × | 1267 100 | − | 8 100 | × | 1049 100 | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | 8 100 | ( | - | 1267 100 | − | 6 | ) | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 8 100 | × | 1267 100 | − | 8 100 | × | 1049 100 | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | - | 8 100 | × | 1267 100 | − | 8 100 | × | 6 | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 1267 1250 | − | 1049 1250 | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | - | 1267 1250 | − | 12 25 | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 1158 625 | − | X | ( | - | 1267 100 | − | 1049 100 | ) | = | - | 1867 1250 | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 1158 625 | + | X | × | 1267 100 | + | X | × | 1049 100 | = | - | 1867 1250 | − | 6 100 | ( | - | 1267 100 | − | 6 | ) |
| - | 1158 625 | + | X | × | 1267 100 | + | X | × | 1049 100 | = | - | 1867 1250 | + | 6 100 | × | 1267 100 | + | 6 100 | × | 6 |
| - | 1158 625 | + | X | × | 1267 100 | + | X | × | 1049 100 | = | - | 1867 1250 | + | 3801 5000 | + | 9 25 |
| - | 1158 625 | + | 579 25 | X | = | - | 1867 5000 |
579 25 | X | = | - | 1867 5000 | + | 1158 625 |
579 25 | X | = | 7397 5000 |
| X | = | 7397 5000 | ÷ | 579 25 |
| = | 7397 5000 | × | 25 579 |
| = | 7397 200 | × | 1 579 |
| X | = | 7397 115800 |
| X | = | 0.063877 |