2 25 | y | + | 1 10 | ( | 1 | − | y | ) | = | 12 125 |
| Left side of the equation = | 2 25 | y | + | 1 10 | × | 1 | − | 1 10 | y |
| = | 2 25 | y | + | 1 10 | − | 1 10 | y |
| = | - | 1 50 | y | + | 1 10 |
| - | 1 50 | y | + | 1 10 | = | 12 125 |
| - | 1 50 | y | = | 12 125 | − | 1 10 |
| - | 1 50 | y | = | - | 1 250 |
1 250 | = | 1 50 | y |
1 50 | y | = | 1 250 |
| y | = | 1 250 | ÷ | 1 50 |
| = | 1 250 | × | 50 |
| = | 1 5 | × | 1 |
| y | = | 1 5 |
| y | = | 0.2 |