| X | = | ( | X | − | 1100 | ) | ÷ | 1 50 | × | 13 100 |
| Right side of the equation = | ( | X | − | 1100 | ) | × | 13 2 |
| X | = | ( | X | − | 1100 | ) | × | 13 2 |
| Right side of the equation = | X | × | 13 2 | − | 1100 | × | 13 2 |
| = | X | × | 13 2 | − | 7150 |
| X | = | 13 2 | X | − | 7150 |
| X | − | 13 2 | X | = | - | 7150 |
| - | 11 2 | X | = | - | 7150 |
| 7150 | = | 11 2 | X |
11 2 | X | = | 7150 |
| X | = | 7150 | ÷ | 11 2 |
| = | 7150 | × | 2 11 |
| = | 650 | × | 2 |
| X | = | 1300 |