| ( | ( | - | 3 | x | − | 210 | ) | ÷ | 60 | ) | + | ( | x | ÷ | 34 | ) | = | 3 |
| 方程左边 = | ( | - | 3 | x | − | 210 | ) | ÷ | 60 | + | ( | x | ÷ | 34 | ) |
| = | - | 3 | x | × | 1 60 | − | 210 | × | 1 60 | + | ( | x | ÷ | 34 | ) |
| = | - | 1 20 | x | − | 7 2 | + | ( | x | ÷ | 34 | ) |
| = | - | 1 20 | x | − | 7 2 | + | x | ÷ | 34 |
| = | - | 7 340 | x | − | 7 2 |
| - | 7 340 | x | − | 7 2 | = | 3 |
| - | 7 340 | x | = | 3 | + | 7 2 |
| - | 7 340 | x | = | 13 2 |
| - | 13 2 | = | 7 340 | x |
7 340 | x | = | - | 13 2 |
| x | = | - | 13 2 | ÷ | 7 340 |
| = | - | 13 2 | × | 340 7 |
| = | - | 13 | × | 170 7 |
| x | = | - | 2210 7 |
| x | = | - 315.714286 |