| ( | 72 | + | 563 2 | ) | ÷ | 30 | × | x | + | 208 | ÷ | 30 | × | ( | x | + | 15 | ) | + | 90 | ÷ | 30 | × | ( | x | + | 30 | ) | = | 1436 |
| 方程左边 = | ( | 72 | + | 563 2 | ) | × | 1 30 | x | + | 104 15 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| ( | 72 | + | 563 2 | ) | × | 1 30 | x | + | 104 15 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 1436 |
| 方程左边 = | 72 | × | 1 30 | x | + | 563 2 | × | 1 30 | x | + | 104 15 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 12 5 | x | + | 563 60 | x | + | 104 15 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 707 60 | x | + | 104 15 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 707 60 | x | + | 104 15 | x | + | 104 15 | × | 15 | + | 3 | ( | x | + | 30 | ) |
| = | 707 60 | x | + | 104 15 | x | + | 104 | + | 3 | ( | x | + | 30 | ) |
| = | 1123 60 | x | + | 104 | + | 3 | ( | x | + | 30 | ) |
| = | 1123 60 | x | + | 104 | + | 3 | x | + | 3 | × | 30 |
| = | 1123 60 | x | + | 104 | + | 3 | x | + | 90 |
| = | 1303 60 | x | + | 194 |
1303 60 | x | + | 194 | = | 1436 |
1303 60 | x | = | 1436 | − | 194 |
1303 60 | x | = | 1242 |
| x | = | 1242 | ÷ | 1303 60 |
| = | 1242 | × | 60 1303 |
| x | = | 74520 1303 |
| x | = | 57.191097 |