| ( | 126 | + | 280 | ) | ÷ | 28 | × | x | + | 224 | ÷ | 28 | × | ( | x | + | 15 | ) | + | 84 | ÷ | 28 | × | ( | x | + | 30 | ) | = | 950 |
| 方程左边 = | ( | 126 | + | 280 | ) | × | 1 28 | x | + | 8 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| ( | 126 | + | 280 | ) | × | 1 28 | x | + | 8 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 950 |
| 方程左边 = | 126 | × | 1 28 | x | + | 280 | × | 1 28 | x | + | 8 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 9 2 | x | + | 10 | x | + | 8 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 29 2 | x | + | 8 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 29 2 | x | + | 8 | x | + | 8 | × | 15 | + | 3 | ( | x | + | 30 | ) |
| = | 29 2 | x | + | 8 | x | + | 120 | + | 3 | ( | x | + | 30 | ) |
| = | 45 2 | x | + | 120 | + | 3 | ( | x | + | 30 | ) |
| = | 45 2 | x | + | 120 | + | 3 | x | + | 3 | × | 30 |
| = | 45 2 | x | + | 120 | + | 3 | x | + | 90 |
| = | 51 2 | x | + | 210 |
51 2 | x | + | 210 | = | 950 |
51 2 | x | = | 950 | − | 210 |
51 2 | x | = | 740 |
| x | = | 740 | ÷ | 51 2 |
| = | 740 | × | 2 51 |
| x | = | 1480 51 |
| x | = | 29.019608 |