75 100 | x | + | ( | 3000 | + | x | ) | × | 55 100 | ÷ | 3000 | × | 100 100 | = | 6 100 |
| 方程左边 = | 75 100 | x | + | ( | 3000 | + | x | ) | × | 11 60000 |
75 100 | x | + | ( | 3000 | + | x | ) | × | 11 60000 | = | 6 100 |
| 方程左边 = | 75 100 | x | + | 3000 | × | 11 60000 | + | x | × | 11 60000 |
| = | 75 100 | x | + | 11 20 | + | x | × | 11 60000 |
| = | 45011 60000 | x | + | 11 20 |
45011 60000 | x | + | 11 20 | = | 6 100 |
45011 60000 | x | = | 6 100 | − | 11 20 |
45011 60000 | x | = | - | 49 100 |
| x | = | - | 49 100 | ÷ | 45011 60000 |
| = | - | 49 100 | × | 60000 45011 |
| = | - | 49 | × | 600 45011 |
| x | = | - | 29400 45011 |
| x | = | - 0.653174 |