| ( | 50000 | ( | 1 | + | 10 100 | ) | + | y | ) | × | 10 100 | = | 50000 | × | 10 100 | + | 1000 |
| Left side of the equation = | 50000 | ( | 1 | + | 10 100 | ) | × | 10 100 | + | y | × | 10 100 |
| = | 5000 | ( | 1 | + | 10 100 | ) | + | y | × | 10 100 |
| = | 5000 | × | 1 | + | 5000 | × | 10 100 | + | 10 100 | y |
| = | 5000 | + | 500 | + | 10 100 | y |
| = | 5500 | + | 10 100 | y |
| 5500 | + | 10 100 | y | = | 50000 | × | 10 100 | + | 1000 |
| Right side of the equation = | 5000 | + | 1000 |
| = | 6000 |
| 5500 | + | 10 100 | y | = | 6000 |
10 100 | y | = | 6000 | − | 5500 |
10 100 | y | = | 500 |
| y | = | 500 | ÷ | 10 100 |
| = | 500 | × | 100 10 |
| = | 50 | × | 100 |
| y | = | 5000 |