| ( | 70 | + | 5 | y | ) | ÷ | 121 10 | − | 60 | ÷ | 11 | = | 1 |
| Left side of the equation = | ( | 70 | + | 5 | y | ) | × | 10 121 | − | 60 11 |
| ( | 70 | + | 5 | y | ) | × | 10 121 | − | 60 11 | = | 1 |
| Left side of the equation = | 70 | × | 10 121 | + | 5 | y | × | 10 121 | − | 60 11 |
| = | 700 121 | + | 50 121 | y | − | 60 11 |
| = | 40 121 | + | 50 121 | y |
40 121 | + | 50 121 | y | = | 1 |
50 121 | y | = | 1 | − | 40 121 |
50 121 | y | = | 81 121 |
| y | = | 81 121 | ÷ | 50 121 |
| = | 81 121 | × | 121 50 |
| = | 81 | × | 1 50 |
| y | = | 81 50 |
| y | = | 1.62 |