| ( | 50000 | ( | 1 | + | 391 2500 | ) | + | y | ) | × | 12 100 | = | 50000 | × | 391 2500 |
| Left side of the equation = | 50000 | ( | 1 | + | 391 2500 | ) | × | 12 100 | + | y | × | 12 100 |
| = | 6000 | ( | 1 | + | 391 2500 | ) | + | y | × | 12 100 |
| = | 6000 | × | 1 | + | 6000 | × | 391 2500 | + | 12 100 | y |
| = | 6000 | + | 4692 5 | + | 12 100 | y |
| = | 34692 5 | + | 12 100 | y |
34692 5 | + | 12 100 | y | = | 50000 | × | 391 2500 |
| Right side of the equation = | 7820 |
34692 5 | + | 12 100 | y | = | 7820 |
12 100 | y | = | 7820 | − | 34692 5 |
12 100 | y | = | 4408 5 |
| y | = | 4408 5 | ÷ | 12 100 |
| = | 4408 5 | × | 100 12 |
| = | 1102 | × | 20 3 |
| y | = | 22040 3 |
| y | = | 7346.666667 |