| ( | 26 | r | r | ) | ÷ | ( | 575 | − | 12 | r | r | ) | = | ( | - | r | + | 3 | ) | ÷ | 13 |
| 方程两边同时乘以: | ( | 575 | − | 12 | r | r | ) |
| ( | 26 | r | r | ) | = | ( | - | r | + | 3 | ) | ÷ | 13 | × | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | ( | - | r | + | 3 | ) | ÷ | 13 | × | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | - | r | ÷ | 13 | × | ( | 575 | − | 12 | r | r | ) | + | 3 | ÷ | 13 | × | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | - | r | × | 1 13 | ( | 575 | − | 12 | r | r | ) | + | 3 13 | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | - | r | × | 1 13 | × | 575 | + | r | × | 1 13 | × | 12 | r | r | + | 3 13 | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | - | r | × | 575 13 | + | r | × | 12 13 | r | r | + | 3 13 | ( | 575 | − | 12 | r | r | ) |
| 26 | r | r | = | - | 575 13 | r | + | r | × | 12 13 | r | r | + | 3 13 | × | 575 | − | 3 13 | × | 12 | r | r |
| 26 | r | r | = | - | 575 13 | r | + | r | × | 12 13 | r | r | + | 1725 13 | − | 36 13 | r | r |