| X | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 6 100 | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | = | 25 |
| 方程两边同时乘以: | ( | 1 | + | 6 100 | ) |
| X | ( | 1 | + | 6 100 | ) | − | X | × | 6 100 | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 25 | ( | 1 | + | 6 100 | ) |
| X | × | 1 | + | X | × | 6 100 | − | X | × | 6 100 | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 25 | ( | 1 | + | 6 100 | ) |
| X | × | 1 | + | X | × | 6 100 | − | X | × | 6 100 | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 25 | × | 1 | + | 25 | × | 6 100 |
| X | × | 1 | + | X | × | 6 100 | − | X | × | 6 100 | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 25 | + | 3 2 |
| 1 | X | − | X | ÷ | ( | 1 | + | 6 100 | ) | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 53 2 |
| 方程两边同时乘以: | ( | 1 | + | 6 100 | ) |
| 1 | X | ( | 1 | + | 6 100 | ) | − | X | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 53 2 | ( | 1 | + | 6 100 | ) |
| 1 | X | × | 1 | + | 1 | X | × | 6 100 | − | X | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 53 2 | ( | 1 | + | 6 100 | ) |
| 1 | X | × | 1 | + | 1 | X | × | 6 100 | − | X | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 53 2 | × | 1 | + | 53 2 | × | 6 100 |
| 1 | X | + | 3 50 | X | − | X | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 53 2 | + | 159 100 |
53 50 | X | − | X | × | 12 100 | ( | 1 | + | 6 100 | ) | = | 2809 100 |
53 50 | X | − | X | × | 12 100 | × | 1 | − | X | × | 12 100 | × | 6 100 | = | 2809 100 |
53 50 | X | − | X | × | 3 25 | − | X | × | 9 1250 | = | 2809 100 |
583 625 | X | = | 2809 100 |
| X | = | 2809 100 | ÷ | 583 625 |
| = | 2809 100 | × | 625 583 |
| = | 2809 4 | × | 25 583 |
| X | = | 70225 2332 |
| X | = | 30.113636 |