| x | ÷ | ( | 210 | + | x | ) | = | 1 100 |
| Multiply both sides of the equation by: | ( | 210 | + | x | ) |
| x | = | 1 100 | ( | 210 | + | x | ) |
| x | = | 1 100 | × | 210 | + | 1 100 | x |
| x | = | 21 10 | + | 1 100 | x |
| x | − | 1 100 | x | = | 21 10 |
99 100 | x | = | 21 10 |
| x | = | 21 10 | ÷ | 99 100 |
| = | 21 10 | × | 100 99 |
| = | 7 | × | 10 33 |
| x | = | 70 33 |
| x | = | 2.121212 |