| 10 | ÷ | 19 | × | ( | 275 | + | ( | 8 | ÷ | 21 | ) | ( | 275 | + | y | ) | ) | = | y |
| Left side of the equation = | 10 19 | ( | 275 | + | ( | 8 | ÷ | 21 | ) | ( | 275 | + | y | ) | ) |
10 19 | ( | 275 | + | ( | 8 | ÷ | 21 | ) | ( | 275 | + | y | ) | ) | = | y |
| Left side of the equation = | 10 19 | × | 275 | + | 10 19 | ( | 8 | ÷ | 21 | ) | ( | 275 | + | y | ) |
| = | 2750 19 | + | 10 19 | ( | 8 | ÷ | 21 | ) | ( | 275 | + | y | ) |
| = | 2750 19 | + | 10 19 | × | 8 | ÷ | 21 | × | ( | 275 | + | y | ) |
| = | 2750 19 | + | 80 399 | ( | 275 | + | y | ) |
| = | 2750 19 | + | 80 399 | × | 275 | + | 80 399 | y |
| = | 2750 19 | + | 22000 399 | + | 80 399 | y |
| = | 79750 399 | + | 80 399 | y |
79750 399 | + | 80 399 | y | = | y |
80 399 | y | − | y | = | - | 79750 399 |
| - | 319 399 | y | = | - | 79750 399 |
79750 399 | = | 319 399 | y |
319 399 | y | = | 79750 399 |
| y | = | 79750 399 | ÷ | 319 399 |
| = | 79750 399 | × | 399 319 |
| = | 250 | × | 1 |
| y | = | 250 |