1 100 | × | 4 | h | = | 1 5 | + | 4 5 | × | 4 | h | × | 1 100 |
| Left side of the equation = | 1 25 | h |
1 25 | h | = | 1 5 | + | 4 5 | × | 4 | h | × | 1 100 |
| Right side of the equation = | 1 5 | + | 4 125 | h |
1 25 | h | = | 1 5 | + | 4 125 | h |
1 25 | h | − | 4 125 | h | = | 1 5 |
1 125 | h | = | 1 5 |
| h | = | 1 5 | ÷ | 1 125 |
| = | 1 5 | × | 125 |
| = | 1 | × | 25 |
| h | = | 25 |