| ( | 22200000 | − | X | ) | ÷ | X | = | 221 1000 |
| Multiply both sides of the equation by: | X |
| ( | 22200000 | − | X | ) | = | 221 1000 | X |
| 22200000 | − | X | = | 221 1000 | X |
| - | X | − | 221 1000 | X | = | - | 22200000 |
| - | 1221 1000 | X | = | - | 22200000 |
| 22200000 | = | 1221 1000 | X |
1221 1000 | X | = | 22200000 |
| X | = | 22200000 | ÷ | 1221 1000 |
| = | 22200000 | × | 1000 1221 |
| = | 7400000 | × | 1000 407 |
| X | = | 7400000000 407 |
| X | = | 200000000 11 |
| X | = | 18181818.181818001 |