| ( | 182 | + | 545 2 | ) | ÷ | 30 | × | x | + | 240 | ÷ | 30 | × | ( | x | + | 15 | ) | + | 120 | ÷ | 30 | × | ( | x | + | 30 | ) | = | 2874 |
| 方程左边 = | ( | 182 | + | 545 2 | ) | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 182 | + | 545 2 | ) | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 2874 |
| 方程左边 = | 182 | × | 1 30 | x | + | 545 2 | × | 1 30 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 91 15 | x | + | 109 12 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 303 20 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 303 20 | x | + | 8 | x | + | 8 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 303 20 | x | + | 8 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 463 20 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 463 20 | x | + | 120 | + | 4 | x | + | 4 | × | 30 |
| = | 463 20 | x | + | 120 | + | 4 | x | + | 120 |
| = | 543 20 | x | + | 240 |
543 20 | x | + | 240 | = | 2874 |
543 20 | x | = | 2874 | − | 240 |
543 20 | x | = | 2634 |
| x | = | 2634 | ÷ | 543 20 |
| = | 2634 | × | 20 543 |
| = | 878 | × | 20 181 |
| x | = | 17560 181 |
| x | = | 97.016575 |