| ( | 1 5 | × | 60 | − | 1 5 | y | + | 1 2 | y | ) | ÷ | 60 | = | 1 10 |
| Left side of the equation = | 1 5 | × | 60 | × | 1 60 | − | 1 5 | y | × | 1 60 | + | 1 2 | y | × | 1 60 |
| = | 1 5 | − | 1 300 | y | + | 1 120 | y |
| = | 1 5 | + | 1 200 | y |
1 5 | + | 1 200 | y | = | 1 10 |
1 200 | y | = | 1 10 | − | 1 5 |
1 200 | y | = | - | 1 10 |
| y | = | - | 1 10 | ÷ | 1 200 |
| = | - | 1 10 | × | 200 |
| = | - | 1 | × | 20 |
| y | = | - | 20 |