| 1 | ÷ | 2020 | × | ( | - | 3 | ) | + | 3 | = | 2 | ( | - | 3 | ) | + | x |
| 方程左边 = | 1 2020 | ( | - | 3 | ) | + | 3 |
1 2020 | ( | - | 3 | ) | + | 3 | = | 2 | ( | - | 3 | ) | + | x |
| 方程左边 = | - | 1 2020 | × | 3 | + | 3 |
| = | - | 3 2020 | + | 3 |
| = | 6057 2020 |
6057 2020 | = | 2 | ( | - | 3 | ) | + | x |
| 方程右边 = | - | 2 | × | 3 | + | x |
| = | - | 6 | + | x |
6057 2020 | = | - | 6 | + | x |
| - | x | = | - | 6 | − | 6057 2020 |
| - | x | = | - | 18177 2020 |
18177 2020 | = | x |
| x | = | 18177 2020 |