| - | 225 | x | + | 1200 | = | 50 |
| - | 225 | x | = | 50 | − | 1200 |
| - | 225 | x | = | - | 1150 |
| 1150 | = | 225 | x |
| 225 | x | = | 1150 |
| x | = | 1150 | ÷ | 225 |
| = | 1150 | × | 1 225 |
| = | 46 | × | 1 9 |
| x | = | 46 9 |
| x | = | 5.111111 |
| 225 | x | − | 1200 | = | 50 |
| 225 | x | = | 50 | + | 1200 |
| 225 | x | = | 1250 |
| x | = | 1250 | ÷ | 225 |
| = | 1250 | × | 1 225 |
| = | 50 | × | 1 9 |
| x | = | 50 9 |
| x | = | 5.555556 |