| ( | 50000 | ( | 1 | + | 20 100 | ) | + | y | ) | × | 12 100 | = | 50000 | × | 20 100 |
| Left side of the equation = | 50000 | ( | 1 | + | 20 100 | ) | × | 12 100 | + | y | × | 12 100 |
| = | 6000 | ( | 1 | + | 20 100 | ) | + | y | × | 12 100 |
| = | 6000 | × | 1 | + | 6000 | × | 20 100 | + | 12 100 | y |
| = | 6000 | + | 1200 | + | 12 100 | y |
| = | 7200 | + | 12 100 | y |
| 7200 | + | 12 100 | y | = | 50000 | × | 20 100 |
| Right side of the equation = | 10000 |
| 7200 | + | 12 100 | y | = | 10000 |
12 100 | y | = | 10000 | − | 7200 |
12 100 | y | = | 2800 |
| y | = | 2800 | ÷ | 12 100 |
| = | 2800 | × | 100 12 |
| = | 700 | × | 100 3 |
| y | = | 70000 3 |
| y | = | 23333.333333 |