| 4 | × | 20 | y | ÷ | 3 | = | 320 | × | 15 | − | y | ÷ | 3 |
| Left side of the equation = | 80 3 | y |
80 3 | y | = | 320 | × | 15 | − | y | ÷ | 3 |
| Right side of the equation = | 4800 | − | y | × | 1 3 |
80 3 | y | = | 4800 | − | 1 3 | y |
80 3 | y | + | 1 3 | y | = | 4800 |
| 27 | y | = | 4800 |
| y | = | 4800 | ÷ | 27 |
| = | 4800 | × | 1 27 |
| = | 1600 | × | 1 9 |
| y | = | 1600 9 |
| y | = | 177.777778 |