| ( | 160 | + | 767 2 | ) | ÷ | 30 | × | x | + | 107 | ÷ | 30 | × | ( | x | + | 15 | ) | + | 120 | ÷ | 30 | × | ( | x | + | 30 | ) | = | 2128 |
| 方程左边 = | ( | 160 | + | 767 2 | ) | × | 1 30 | x | + | 107 30 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 160 | + | 767 2 | ) | × | 1 30 | x | + | 107 30 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 2128 |
| 方程左边 = | 160 | × | 1 30 | x | + | 767 2 | × | 1 30 | x | + | 107 30 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 16 3 | x | + | 767 60 | x | + | 107 30 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 1087 60 | x | + | 107 30 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 1087 60 | x | + | 107 30 | x | + | 107 30 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 1087 60 | x | + | 107 30 | x | + | 107 2 | + | 4 | ( | x | + | 30 | ) |
| = | 1301 60 | x | + | 107 2 | + | 4 | ( | x | + | 30 | ) |
| = | 1301 60 | x | + | 107 2 | + | 4 | x | + | 4 | × | 30 |
| = | 1301 60 | x | + | 107 2 | + | 4 | x | + | 120 |
| = | 1541 60 | x | + | 347 2 |
1541 60 | x | + | 347 2 | = | 2128 |
1541 60 | x | = | 2128 | − | 347 2 |
1541 60 | x | = | 3909 2 |
| x | = | 3909 2 | ÷ | 1541 60 |
| = | 3909 2 | × | 60 1541 |
| = | 3909 | × | 30 1541 |
| x | = | 117270 1541 |
| x | = | 76.099935 |