| ( | 220 | × | 63 | − | x | ) | × | 19 20 | = | 11756 |
| Left side of the equation = | 220 | × | 63 | × | 19 20 | − | x | × | 19 20 |
| = | 13167 | − | x | × | 19 20 |
| 13167 | − | 19 20 | x | = | 11756 |
| - | 19 20 | x | = | 11756 | − | 13167 |
| - | 19 20 | x | = | - | 1411 |
| 1411 | = | 19 20 | x |
19 20 | x | = | 1411 |
| x | = | 1411 | ÷ | 19 20 |
| = | 1411 | × | 20 19 |
| x | = | 28220 19 |
| x | = | 1485.263158 |