| ( | 1 5000 | + | X | ) | ( | 9 1000 | + | X | ) | ÷ | ( | 1 5000 | − | X | ) | = | 1 100 |
| 方程两边同时乘以: | ( | 1 5000 | − | X | ) |
| ( | 1 5000 | + | X | ) | ( | 9 1000 | + | X | ) | = | 1 100 | ( | 1 5000 | − | X | ) |
1 5000 | ( | 9 1000 | + | X | ) | + | X | ( | 9 1000 | + | X | ) | = | 1 100 | ( | 1 5000 | − | X | ) |
1 5000 | ( | 9 1000 | + | X | ) | + | X | ( | 9 1000 | + | X | ) | = | 1 100 | × | 1 5000 | − | 1 100 | X |
1 5000 | ( | 9 1000 | + | X | ) | + | X | ( | 9 1000 | + | X | ) | = | 1 500000 | − | 1 100 | X |
1 5000 | × | 9 1000 | + | 1 5000 | X | + | X | ( | 9 1000 | + | X | ) | = | 1 500000 | − | 1 100 | X |
9 5000000 | + | 1 5000 | X | + | X | ( | 9 1000 | + | X | ) | = | 1 500000 | − | 1 100 | X |
9 5000000 | + | 1 5000 | X | + | X | × | 9 1000 | + | X | X | = | 1 500000 | − | 1 100 | X |
9 5000000 | + | 23 2500 | X | + | X | X | = | 1 500000 | − | 1 100 | X |