| ( | 4300 | − | 4000 | ) | ÷ | ( | 5000 | − | 4000 | ) | = | ( | x | − | 6528 | ) | ÷ | ( | 7140 | − | 6528 | ) |
| 方程两边同时乘以: | ( | 5000 | − | 4000 | ) | , | ( | 7140 | − | 6528 | ) |
| ( | 4300 | − | 4000 | ) | ( | 7140 | − | 6528 | ) | = | ( | x | − | 6528 | ) | ( | 5000 | − | 4000 | ) |
| 4300 | ( | 7140 | − | 6528 | ) | − | 4000 | ( | 7140 | − | 6528 | ) | = | ( | x | − | 6528 | ) | ( | 5000 | − | 4000 | ) |
| 4300 | ( | 7140 | − | 6528 | ) | − | 4000 | ( | 7140 | − | 6528 | ) | = | x | ( | 5000 | − | 4000 | ) | − | 6528 | ( | 5000 | − | 4000 | ) |
| 4300 | × | 7140 | − | 4300 | × | 6528 | − | 4000 | ( | 7140 | − | 6528 | ) | = | x | ( | 5000 | − | 4000 | ) | − | 6528 | ( | 5000 | − | 4000 | ) |
| 4300 | × | 7140 | − | 4300 | × | 6528 | − | 4000 | ( | 7140 | − | 6528 | ) | = | x | × | 5000 | − | x | × | 4000 | − | 6528 | ( | 5000 | − | 4000 | ) |
| 30702000 | − | 28070400 | − | 4000 | ( | 7140 | − | 6528 | ) | = | x | × | 5000 | − | x | × | 4000 | − | 6528 | ( | 5000 | − | 4000 | ) |
| 2631600 | − | 4000 | ( | 7140 | − | 6528 | ) | = | 1000 | x | − | 6528 | ( | 5000 | − | 4000 | ) |
| 2631600 | − | 4000 | × | 7140 | + | 4000 | × | 6528 | = | 1000 | x | − | 6528 | ( | 5000 | − | 4000 | ) |
| 2631600 | − | 4000 | × | 7140 | + | 4000 | × | 6528 | = | 1000 | x | − | 6528 | × | 5000 | + | 6528 | × | 4000 |
| 2631600 | − | 28560000 | + | 26112000 | = | 1000 | x | − | 32640000 | + | 26112000 |
| 183600 | = | 1000 | x | − | 6528000 |
| - | 1000 | x | = | - | 6528000 | − | 183600 |
| - | 1000 | x | = | - | 6711600 |
| 6711600 | = | 1000 | x |
| 1000 | x | = | 6711600 |
| x | = | 6711600 | ÷ | 1000 |
| = | 6711600 | × | 1 1000 |
| = | 33558 | × | 1 5 |
| x | = | 33558 5 |
| x | = | 6711.6 |