| ( | 156 | + | 585 2 | ) | ÷ | 30 | × | x | + | 240 | ÷ | 30 | × | ( | x | + | 15 | ) | + | 120 | ÷ | 30 | × | ( | x | + | 30 | ) | = | 1910 |
| 方程左边 = | ( | 156 | + | 585 2 | ) | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 156 | + | 585 2 | ) | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1910 |
| 方程左边 = | 156 | × | 1 30 | x | + | 585 2 | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 26 5 | x | + | 39 4 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 299 20 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 299 20 | x | + | 8 | x | + | 8 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 299 20 | x | + | 8 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 459 20 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 459 20 | x | + | 120 | + | 4 | x | + | 4 | × | 30 |
| = | 459 20 | x | + | 120 | + | 4 | x | + | 120 |
| = | 539 20 | x | + | 240 |
539 20 | x | + | 240 | = | 1910 |
539 20 | x | = | 1910 | − | 240 |
539 20 | x | = | 1670 |
| x | = | 1670 | ÷ | 539 20 |
| = | 1670 | × | 20 539 |
| x | = | 33400 539 |
| x | = | 61.966605 |