| ( | 60 | X | ÷ | 2 | − | 20 | ) | ÷ | X | + | ( | 60 | X | ÷ | 2 | + | 20 | ) | ÷ | 5 4 | × | X | + | 10 | = | 62 |
| 方程两边同时乘以: | X |
| ( | 60 | X | ÷ | 2 | − | 20 | ) | + | ( | 60 | X | ÷ | 2 | + | 20 | ) | ÷ | 5 4 | × | X | X | + | 10 | X | = | 62 | X |
| 60 | X | ÷ | 2 | − | 20 | + | ( | 60 | X | ÷ | 2 | + | 20 | ) | ÷ | 5 4 | × | X | X | + | 10 | X | = | 62 | X |
| 30 | X | − | 20 | + | ( | 60 | X | ÷ | 2 | + | 20 | ) | × | 4 5 | X | X | + | 10 | X | = | 62 | X |
| 40 | X | − | 20 | + | ( | 60 | X | ÷ | 2 | + | 20 | ) | × | 4 5 | X | X | = | 62 | X |
| 40 | X | − | 20 | + | 60 | X | ÷ | 2 | × | 4 5 | X | X | + | 20 | × | 4 5 | X | = | 62 | X |
| 40 | X | − | 20 | + | 24 | X | X | X | + | 16 | X | X | = | 62 | X |