| ( | x | − | 10 100 | ) | ÷ | ( | 12 100 | − | 10 100 | ) | = | ( | 0 | − | 50000 | ) | ÷ | ( | - | 10000 | − | 50000 | ) |
| 方程两边同时乘以: | ( | 12 100 | − | 10 100 | ) | , | ( | - | 10000 | − | 50000 | ) |
| ( | x | − | 10 100 | ) | ( | - | 10000 | − | 50000 | ) | = | ( | 0 | − | 50000 | ) | ( | 12 100 | − | 10 100 | ) |
| x | ( | - | 10000 | − | 50000 | ) | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | ( | 0 | − | 50000 | ) | ( | 12 100 | − | 10 100 | ) |
| x | ( | - | 10000 | − | 50000 | ) | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | 0 | ( | 12 100 | − | 10 100 | ) | − | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | x | × | 10000 | − | x | × | 50000 | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | 0 | ( | 12 100 | − | 10 100 | ) | − | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | x | × | 10000 | − | x | × | 50000 | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | 0 | × | 12 100 | − | 0 | × | 10 100 | − | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | x | × | 10000 | − | x | × | 50000 | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | 0 | − | 0 | − | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | 60000 | x | − | 10 100 | ( | - | 10000 | − | 50000 | ) | = | 0 | − | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | 60000 | x | + | 10 100 | × | 10000 | + | 10 100 | × | 50000 | = | - | 50000 | ( | 12 100 | − | 10 100 | ) |
| - | 60000 | x | + | 10 100 | × | 10000 | + | 10 100 | × | 50000 | = | - | 50000 | × | 12 100 | + | 50000 | × | 10 100 |
| - | 60000 | x | + | 1000 | + | 5000 | = | - | 6000 | + | 5000 |
| - | 60000 | x | + | 6000 | = | - | 1000 |
| - | 60000 | x | = | - | 1000 | − | 6000 |
| - | 60000 | x | = | - | 7000 |
| 7000 | = | 60000 | x |
| 60000 | x | = | 7000 |
| x | = | 7000 | ÷ | 60000 |
| = | 7000 | × | 1 60000 |
| = | 7 | × | 1 60 |
| x | = | 7 60 |
| x | = | 0.116667 |