| ( | 1813 10 | + | x | ) | ÷ | x | = | 81 20 |
| Multiply both sides of the equation by: | x |
| ( | 1813 10 | + | x | ) | = | 81 20 | x |
1813 10 | + | x | = | 81 20 | x |
| x | − | 81 20 | x | = | - | 1813 10 |
| - | 61 20 | x | = | - | 1813 10 |
1813 10 | = | 61 20 | x |
61 20 | x | = | 1813 10 |
| x | = | 1813 10 | ÷ | 61 20 |
| = | 1813 10 | × | 20 61 |
| = | 1813 | × | 2 61 |
| x | = | 3626 61 |
| x | = | 59.442623 |