| ( | 1 1000 | − | 1 100 | x | ) | ÷ | ( | 1 10 | + | x | ) | = | 0 |
| Multiply both sides of the equation by: | ( | 1 10 | + | x | ) |
| ( | 1 1000 | − | 1 100 | x | ) | = | 0 |
1 1000 | − | 1 100 | x | = | 0 |
| - | 1 100 | x | = | 0 | − | 1 1000 |
| - | 1 100 | x | = | - | 1 1000 |
1 1000 | = | 1 100 | x |
1 100 | x | = | 1 1000 |
| x | = | 1 1000 | ÷ | 1 100 |
| = | 1 1000 | × | 100 |
| = | 1 10 | × | 1 |
| x | = | 1 10 |
| x | = | 0.1 |