| 200 | × | 122 | ( | 415 | − | x | ÷ | 2 | ) | × | 119 10 | = | 0 |
| Left side of the equation = | 290360 | ( | 415 | − | x | ÷ | 2 | ) |
| 290360 | ( | 415 | − | x | ÷ | 2 | ) | = | 0 |
| Left side of the equation = | 290360 | × | 415 | − | 290360 | x | ÷ | 2 |
| = | 120499400 | − | 145180 | x |
| 120499400 | − | 145180 | x | = | 0 |
| - | 145180 | x | = | 0 | − | 120499400 |
| - | 145180 | x | = | - | 120499400 |
| 120499400 | = | 145180 | x |
| 145180 | x | = | 120499400 |
| x | = | 120499400 | ÷ | 145180 |
| = | 120499400 | × | 1 145180 |
| = | 830 | × | 1 |
| x | = | 830 |