| 5 | ( | 2 | x | + | 2 | ) | = | 7 | ( | x | − | 1 | ) | + | 35 | × | 6 |
| 方程左边 = | 5 | × | 2 | x | + | 5 | × | 2 |
| = | 10 | x | + | 10 |
| 10 | x | + | 10 | = | 7 | ( | x | − | 1 | ) | + | 35 | × | 6 |
| 方程右边 = | 7 | ( | x | − | 1 | ) | + | 210 |
| 10 | x | + | 10 | = | 7 | ( | x | − | 1 | ) | + | 210 |
| 方程右边 = | 7 | x | − | 7 | × | 1 | + | 210 |
| = | 7 | x | − | 7 | + | 210 |
| = | 7 | x | + | 203 |
| 10 | x | + | 10 | = | 7 | x | + | 203 |
| 10 | x | − | 7 | x | = | 203 | − | 10 |
| 3 | x | = | 203 | − | 10 |
| 3 | x | = | 193 |
| x | = | 193 | ÷ | 3 |
| = | 193 | × | 1 3 |
| x | = | 193 3 |
| x | = | 64.333333 |