| ( | x | − | 1160 | ) | ÷ | 1700 | = | ( | x | − | 1400 | ) | ÷ | 1200 |
| 方程左边 = | x | × | 1 1700 | − | 1160 | × | 1 1700 |
| = | x | × | 1 1700 | − | 58 85 |
1 1700 | x | − | 58 85 | = | ( | x | − | 1400 | ) | ÷ | 1200 |
| 方程右边 = | x | × | 1 1200 | − | 1400 | × | 1 1200 |
| = | x | × | 1 1200 | − | 7 6 |
1 1700 | x | − | 58 85 | = | 1 1200 | x | − | 7 6 |
1 1700 | x | − | 1 1200 | x | = | - | 7 6 | + | 58 85 |
| - | 1 4080 | x | = | - | 7 6 | + | 58 85 |
| - | 1 4080 | x | = | - | 247 510 |
247 510 | = | 1 4080 | x |
1 4080 | x | = | 247 510 |
| x | = | 247 510 | ÷ | 1 4080 |
| = | 247 510 | × | 4080 |
| = | 247 | × | 8 |
| x | = | 1976 |