| ( | y | − | 2 | ) | ÷ | 2019 | + | y | ÷ | 2020 | + | ( | y | + | 2 | ) | ÷ | 2021 | = | 6 |
| 方程左边 = | y | × | 1 2019 | − | 2 | × | 1 2019 | + | 1 2020 | y | + | ( | y | + | 2 | ) | × | 1 2021 |
| = | y | × | 1 2019 | − | 2 2019 | + | 1 2020 | y | + | ( | y | + | 2 | ) | × | 1 2021 |
| = | 4039 4078380 | y | − | 2 2019 | + | ( | y | + | 2 | ) | × | 1 2021 |
| = | 4039 4078380 | y | − | 2 2019 | + | y | × | 1 2021 | + | 2 | × | 1 2021 |
| = | 4039 4078380 | y | − | 2 2019 | + | y | × | 1 2021 | + | 2 2021 |
| = | 12241199 8242405980 | y | − | 4 4080399 |
12241199 8242405980 | y | − | 4 4080399 | = | 6 |
12241199 8242405980 | y | = | 6 | + | 4 4080399 |
12241199 8242405980 | y | = | 24482398 4080399 |
| y | = | 24482398 4080399 | ÷ | 12241199 8242405980 |
| = | 24482398 4080399 | × | 8242405980 12241199 |
| = | 13966 673 | × | 1359460 6983 |
| y | = | 18986218360 4699559 |