| X | − | 200 | = | ( | X | − | 350 | ) | × | 11 10 |
| Right side of the equation = | X | × | 11 10 | − | 350 | × | 11 10 |
| = | X | × | 11 10 | − | 385 |
| X | − | 200 | = | 11 10 | X | − | 385 |
| X | − | 11 10 | X | = | - | 385 | + | 200 |
| - | 1 10 | X | = | - | 385 | + | 200 |
| - | 1 10 | X | = | - | 185 |
| 185 | = | 1 10 | X |
1 10 | X | = | 185 |
| X | = | 185 | ÷ | 1 10 |
| = | 185 | × | 10 |
| X | = | 1850 |