7 200 | = | y | ÷ | ( | 247 100 | − | 147 100 | y | ) |
| Multiply both sides of the equation by: | ( | 247 100 | − | 147 100 | y | ) |
7 200 | ( | 247 100 | − | 147 100 | y | ) | = | y |
7 200 | × | 247 100 | − | 7 200 | × | 147 100 | y | = | y |
1729 20000 | − | 1029 20000 | y | = | y |
| - | 1029 20000 | y | − | y | = | - | 1729 20000 |
| - | 21029 20000 | y | = | - | 1729 20000 |
1729 20000 | = | 21029 20000 | y |
21029 20000 | y | = | 1729 20000 |
| y | = | 1729 20000 | ÷ | 21029 20000 |
| = | 1729 20000 | × | 20000 21029 |
| = | 1729 | × | 1 21029 |
| y | = | 1729 21029 |
| y | = | 0.08222 |