| ( | ( | 19 20 | + | 31 20 | ) | × | 19 20 | + | y | ) | × | 103 100 | = | 1 | + | y | + | 31 20 |
| Left side of the equation = | ( | 19 20 | + | 31 20 | ) | × | 19 20 | × | 103 100 | + | y | × | 103 100 |
| = | ( | 19 20 | + | 31 20 | ) | × | 1957 2000 | + | y | × | 103 100 |
| = | 19 20 | × | 1957 2000 | + | 31 20 | × | 1957 2000 | + | 103 100 | y |
| = | 37183 40000 | + | 60667 40000 | + | 103 100 | y |
| = | 1957 800 | + | 103 100 | y |
1957 800 | + | 103 100 | y | = | 1 | + | y | + | 31 20 |
| Right side of the equation = | 51 20 | + | y |
1957 800 | + | 103 100 | y | = | 51 20 | + | y |
103 100 | y | − | y | = | 51 20 | − | 1957 800 |
3 100 | y | = | 51 20 | − | 1957 800 |
3 100 | y | = | 83 800 |
| y | = | 83 800 | ÷ | 3 100 |
| = | 83 800 | × | 100 3 |
| = | 83 8 | × | 1 3 |
| y | = | 83 24 |
| y | = | 3.458333 |