| ( | 1 | + | 40 100 | ) | ( | 480 | − | x | ) | × | 90 100 | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 | = | 480 | + | 96 |
| 方程左边 = | 1 | ( | 480 | − | x | ) | × | 90 100 | + | 40 100 | ( | 480 | − | x | ) | × | 90 100 | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 9 10 | ( | 480 | − | x | ) | + | 9 25 | ( | 480 | − | x | ) | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 9 10 | × | 480 | − | 9 10 | x | + | 9 25 | ( | 480 | − | x | ) | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 432 | − | 9 10 | x | + | 9 25 | ( | 480 | − | x | ) | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 432 | − | 9 10 | x | + | 9 25 | × | 480 | − | 9 25 | x | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 432 | − | 9 10 | x | + | 864 5 | − | 9 25 | x | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 3024 5 | − | 63 50 | x | + | ( | 1 | + | 45 100 | ) | x | × | 80 100 |
| = | 3024 5 | − | 63 50 | x | + | 1 | x | × | 80 100 | + | 45 100 | x | × | 80 100 |
| = | 3024 5 | − | 63 50 | x | + | 4 5 | x | + | 9 25 | x |
| = | 3024 5 | − | 1 10 | x |
3024 5 | − | 1 10 | x | = | 480 | + | 96 |
| 方程右边 = | 576 |
3024 5 | − | 1 10 | x | = | 576 |
| - | 1 10 | x | = | 576 | − | 3024 5 |
| - | 1 10 | x | = | - | 144 5 |
144 5 | = | 1 10 | x |
1 10 | x | = | 144 5 |
| x | = | 144 5 | ÷ | 1 10 |
| = | 144 5 | × | 10 |
| = | 144 | × | 2 |
| x | = | 288 |