| y | ( | 1 | + | 40 100 | ) | × | 4 5 | + | ( | 210 | − | y | ) | ( | 1 | − | 40 100 | ) | × | 9 10 | = | 182 |
| 方程左边 = | y | × | 1 | × | 4 5 | + | y | × | 40 100 | × | 4 5 | + | ( | 210 | − | y | ) | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | y | × | 4 5 | + | y | × | 8 25 | + | ( | 210 | − | y | ) | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | ( | 210 | − | y | ) | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 210 | ( | 1 | − | 40 100 | ) | × | 9 10 | − | y | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 189 | ( | 1 | − | 40 100 | ) | − | y | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 189 | × | 1 | − | 189 | × | 40 100 | − | y | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 189 | − | 378 5 | − | y | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 567 5 | − | y | ( | 1 | − | 40 100 | ) | × | 9 10 |
| = | 28 25 | y | + | 567 5 | − | y | × | 1 | × | 9 10 | + | y | × | 40 100 | × | 9 10 |
| = | 28 25 | y | + | 567 5 | − | y | × | 9 10 | + | y | × | 9 25 |
| = | 29 50 | y | + | 567 5 |
29 50 | y | + | 567 5 | = | 182 |
29 50 | y | = | 182 | − | 567 5 |
29 50 | y | = | 343 5 |
| y | = | 343 5 | ÷ | 29 50 |
| = | 343 5 | × | 50 29 |
| = | 343 | × | 10 29 |
| y | = | 3430 29 |
| y | = | 118.275862 |