| ( | 1950 | − | 3400 | ) | ÷ | ( | x | − | 200 | ) | = | ( | 0 | − | 1950 | ) | ÷ | ( | 60 | − | x | ) |
| 方程两边同时乘以: | ( | x | − | 200 | ) | , | ( | 60 | − | x | ) |
| ( | 1950 | − | 3400 | ) | ( | 60 | − | x | ) | = | ( | 0 | − | 1950 | ) | ( | x | − | 200 | ) |
| 1950 | ( | 60 | − | x | ) | − | 3400 | ( | 60 | − | x | ) | = | ( | 0 | − | 1950 | ) | ( | x | − | 200 | ) |
| 1950 | ( | 60 | − | x | ) | − | 3400 | ( | 60 | − | x | ) | = | 0 | ( | x | − | 200 | ) | − | 1950 | ( | x | − | 200 | ) |
| 1950 | × | 60 | − | 1950 | x | − | 3400 | ( | 60 | − | x | ) | = | 0 | ( | x | − | 200 | ) | − | 1950 | ( | x | − | 200 | ) |
| 1950 | × | 60 | − | 1950 | x | − | 3400 | ( | 60 | − | x | ) | = | 0 | x | − | 0 | × | 200 | − | 1950 | ( | x | − | 200 | ) |
| 117000 | − | 1950 | x | − | 3400 | ( | 60 | − | x | ) | = | 0 | x | − | 0 | − | 1950 | ( | x | − | 200 | ) |
| 117000 | − | 1950 | x | − | 3400 | × | 60 | + | 3400 | x | = | - | 1950 | ( | x | − | 200 | ) |
| 117000 | − | 1950 | x | − | 3400 | × | 60 | + | 3400 | x | = | - | 1950 | x | + | 1950 | × | 200 |
| 117000 | − | 1950 | x | − | 204000 | + | 3400 | x | = | - | 1950 | x | + | 390000 |
| - | 87000 | + | 1450 | x | = | - | 1950 | x | + | 390000 |
| 1450 | x | + | 1950 | x | = | 390000 | + | 87000 |
| 3400 | x | = | 390000 | + | 87000 |
| 3400 | x | = | 477000 |
| x | = | 477000 | ÷ | 3400 |
| = | 477000 | × | 1 3400 |
| = | 2385 | × | 1 17 |
| x | = | 2385 17 |
| x | = | 140.294118 |