| 36000 | × | 3 100 | + | ( | x | − | 36000 | ) | × | 10 100 | − | 48000 | × | 3 100 | + | ( | x | − | 48000 | ) | × | 10 100 | = | 1170 |
| 方程左边 = | 1080 | + | ( | x | − | 36000 | ) | × | 10 100 | − | 1440 | + | ( | x | − | 48000 | ) | × | 10 100 |
| = | - | 360 | + | ( | x | − | 36000 | ) | × | 10 100 | + | ( | x | − | 48000 | ) | × | 10 100 |
| - | 360 | + | ( | x | − | 36000 | ) | × | 10 100 | + | ( | x | − | 48000 | ) | × | 10 100 | = | 1170 |
| 方程左边 = | - | 360 | + | x | × | 10 100 | − | 36000 | × | 10 100 | + | ( | x | − | 48000 | ) | × | 10 100 |
| = | - | 360 | + | x | × | 10 100 | − | 3600 | + | ( | x | − | 48000 | ) | × | 10 100 |
| = | - | 3960 | + | 10 100 | x | + | ( | x | − | 48000 | ) | × | 10 100 |
| = | - | 3960 | + | 10 100 | x | + | x | × | 10 100 | − | 48000 | × | 10 100 |
| = | - | 3960 | + | 10 100 | x | + | x | × | 10 100 | − | 4800 |
| = | - | 8760 | + | 1 5 | x |
| - | 8760 | + | 1 5 | x | = | 1170 |
1 5 | x | = | 1170 | + | 8760 |
1 5 | x | = | 9930 |
| x | = | 9930 | ÷ | 1 5 |
| = | 9930 | × | 5 |
| x | = | 49650 |