| ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | = | 1 | ÷ | r |
| 方程两边同时乘以: | r |
| ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | = | 1 |
| 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | − | 1 | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | = | 1 |
| 35350 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | − | 1 | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | = | 1 |
| 方程两边同时乘以: | ( | 600 | − | r | ) |
| 35350 | ÷ | 1 | × | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | × | 1 | − | 1 | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | ( | 600 | − | r | ) | = | 1 | ( | 600 | − | r | ) |
| 35350 | ÷ | 1 | × | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | 1 | − | 35350 | ÷ | 1 | × | 1 | × | 1 | − | 1 | = | 1 | ( | 600 | − | r | ) |
| 35350 | ÷ | 1 | × | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | 1 | − | 35350 | ÷ | 1 | × | 1 | × | 1 | − | 1 | = | 1 | × | 600 | − | 1 | r |
| 1249622500 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 35350 | − | 1 | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | ( | 600 | − | r | ) | = | 600 | − | 1 | r |
| 方程两边同时乘以: | r |
| 1249622500 | ÷ | ( | 600 | − | r | ) | − | 35350 | r | − | 1 | ( | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | − | 1 | ) | r | ( | 600 | − | r | ) | r | = | 600 | r | − | 1 | r | r |
| 1249622500 | ÷ | ( | 600 | − | r | ) | − | 35350 | r | − | 1 | × | 50 | × | 707 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | r | ( | 600 | − | r | ) | r | = | 600 | r | − | 1 | r | r |
| 1249622500 | ÷ | ( | 600 | − | r | ) | − | 35350 | r | − | 35350 | ÷ | r | ÷ | ( | 600 | − | r | ) | × | r | ( | 600 | − | r | ) | r | + | 1 | r | = | 600 | r | − | 1 | r | r |
| 方程两边同时乘以: | ( | 600 | − | r | ) |
| 1249622500 | − | 35350 | r | ( | 600 | − | r | ) | − | 35350 | ÷ | 1 | × | 1 | ( | 600 | − | r | ) | r | + | 1 | r | ( | 600 | − | r | ) | = | 600 | r | ( | 600 | − | r | ) | − | 1 | r | r | ( | 600 | − | r | ) |
| 1249622500 | − | 35350 | r | × | 600 | + | 35350 | r | r | − | 35350 | ÷ | 1 | × | 1 | ( | 600 | − | r | ) | r | = | 600 | r | ( | 600 | − | r | ) | − | 1 | r | r | ( | 600 | − | r | ) |
| 1249622500 | − | 35350 | r | × | 600 | + | 35350 | r | r | − | 35350 | ÷ | 1 | × | 1 | ( | 600 | − | r | ) | r | = | 600 | r | × | 600 | − | 600 | r | r | − | 1 | r | r | ( | 600 | − | r | ) |
| 1249622500 | − | 21210000 | r | + | 35350 | r | r | − | 35350 | ( | 600 | − | r | ) | r | + | 1 | r | ( | 600 | − | r | ) | = | 360000 | r | − | 600 | r | r | − | 1 | r | r | ( | 600 | − | r | ) |
| 1249622500 | − | 21210000 | r | + | 35350 | r | r | − | 35350 | × | 600 | r | + | 35350 | r | r | = | 360000 | r | − | 600 | r | r | − | 1 | r | r | ( | 600 | − | r | ) |
| 1249622500 | − | 21210000 | r | + | 35350 | r | r | − | 35350 | × | 600 | r | + | 35350 | r | r | = | 360000 | r | − | 600 | r | r | − | 1 | r | r | × | 600 | + | 1 | r | r |
| 1249622500 | − | 21210000 | r | + | 35350 | r | r | − | 21210000 | r | + | 35350 | r | r | + | 1 | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |
| 1249622500 | − | 42420000 | r | + | 35350 | r | r | + | 35350 | r | r | + | 1 | r | ( | 600 | − | r | ) | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |
| 1249622500 | − | 42420000 | r | + | 35350 | r | r | + | 35350 | r | r | + | 1 | r | × | 600 | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |
| 1249622500 | − | 42420000 | r | + | 35350 | r | r | + | 35350 | r | r | + | 600 | r | r | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |
| 1249622500 | − | 42420000 | r | + | 35350 | r | r | + | 35350 | r | r | + | 600 | r | r | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |
| 1249622500 | − | 42420000 | r | + | 35350 | r | r | + | 35350 | r | r | + | 360000 | r | r | = | 360000 | r | − | 600 | r | r | − | 600 | r | r | + | 1 | r | r | r |