| ( | 3000 | − | 1090 | ) | ÷ | ( | 781 10 | − | x | ) | = | ( | 500 | − | 1090 | ) | ÷ | ( | 33 2 | − | x | ) |
| 方程两边同时乘以: | ( | 781 10 | − | x | ) | , | ( | 33 2 | − | x | ) |
| ( | 3000 | − | 1090 | ) | ( | 33 2 | − | x | ) | = | ( | 500 | − | 1090 | ) | ( | 781 10 | − | x | ) |
| 3000 | ( | 33 2 | − | x | ) | − | 1090 | ( | 33 2 | − | x | ) | = | ( | 500 | − | 1090 | ) | ( | 781 10 | − | x | ) |
| 3000 | ( | 33 2 | − | x | ) | − | 1090 | ( | 33 2 | − | x | ) | = | 500 | ( | 781 10 | − | x | ) | − | 1090 | ( | 781 10 | − | x | ) |
| 3000 | × | 33 2 | − | 3000 | x | − | 1090 | ( | 33 2 | − | x | ) | = | 500 | ( | 781 10 | − | x | ) | − | 1090 | ( | 781 10 | − | x | ) |
| 3000 | × | 33 2 | − | 3000 | x | − | 1090 | ( | 33 2 | − | x | ) | = | 500 | × | 781 10 | − | 500 | x | − | 1090 | ( | 781 10 | − | x | ) |
| 49500 | − | 3000 | x | − | 1090 | ( | 33 2 | − | x | ) | = | 39050 | − | 500 | x | − | 1090 | ( | 781 10 | − | x | ) |
| 49500 | − | 3000 | x | − | 1090 | × | 33 2 | + | 1090 | x | = | 39050 | − | 500 | x | − | 1090 | ( | 781 10 | − | x | ) |
| 49500 | − | 3000 | x | − | 1090 | × | 33 2 | + | 1090 | x | = | 39050 | − | 500 | x | − | 1090 | × | 781 10 | + | 1090 | x |
| 49500 | − | 3000 | x | − | 17985 | + | 1090 | x | = | 39050 | − | 500 | x | − | 85129 | + | 1090 | x |
| 31515 | − | 1910 | x | = | - | 46079 | + | 590 | x |
| - | 1910 | x | − | 590 | x | = | - | 46079 | − | 31515 |
| - | 2500 | x | = | - | 46079 | − | 31515 |
| - | 2500 | x | = | - | 77594 |
| 77594 | = | 2500 | x |
| 2500 | x | = | 77594 |
| x | = | 77594 | ÷ | 2500 |
| = | 77594 | × | 1 2500 |
| = | 38797 | × | 1 1250 |
| x | = | 38797 1250 |
| x | = | 31.0376 |