| ( | 19 20 | + | x | ) | × | 101 100 | = | 1 | + | x |
| Left side of the equation = | 19 20 | × | 101 100 | + | x | × | 101 100 |
| = | 1919 2000 | + | x | × | 101 100 |
1919 2000 | + | 101 100 | x | = | 1 | + | x |
101 100 | x | − | x | = | 1 | − | 1919 2000 |
1 100 | x | = | 1 | − | 1919 2000 |
1 100 | x | = | 81 2000 |
| x | = | 81 2000 | ÷ | 1 100 |
| = | 81 2000 | × | 100 |
| = | 81 20 | × | 1 |
| x | = | 81 20 |
| x | = | 4.05 |