| x | × | 600 | ( | 1 | − | 25 100 | ) | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 360 | × | 25 100 | = | 29167 50 |
| 方程左边 = | x | × | 600 | ( | 1 | − | 25 100 | ) | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 90 |
| x | × | 600 | ( | 1 | − | 25 100 | ) | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 90 | = | 29167 50 |
| 方程左边 = | x | × | 600 | × | 1 | − | x | × | 600 | × | 25 100 | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 90 |
| = | x | × | 600 | − | x | × | 150 | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 450 | x | − | ( | x | × | 400 | + | 100 | ) | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 450 | x | − | x | × | 400 | ( | 1 | − | 25 100 | ) | − | 100 | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 450 | x | − | x | × | 400 | × | 1 | + | x | × | 400 | × | 25 100 | − | 100 | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 450 | x | − | x | × | 400 | + | x | × | 100 | − | 100 | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 150 | x | − | 100 | ( | 1 | − | 25 100 | ) | + | 90 |
| = | 150 | x | − | 100 | × | 1 | + | 100 | × | 25 100 | + | 90 |
| = | 150 | x | − | 100 | + | 25 | + | 90 |
| = | 150 | x | + | 15 |
| 150 | x | + | 15 | = | 29167 50 |
| 150 | x | = | 29167 50 | − | 15 |
| 150 | x | = | 28417 50 |
| x | = | 28417 50 | ÷ | 150 |
| = | 28417 50 | × | 1 150 |
| x | = | 28417 7500 |
| x | = | 3.788933 |