| 103771 | − | 20 | x | = | - | 6 | ( | 78478 | + | 180 | x | ) |
| Right side of the equation = | - | 6 | × | 78478 | − | 6 | × | 180 | x |
| = | - | 470868 | − | 1080 | x |
| 103771 | − | 20 | x | = | - | 470868 | − | 1080 | x |
| - | 20 | x | + | 1080 | x | = | - | 470868 | − | 103771 |
| 1060 | x | = | - | 470868 | − | 103771 |
| 1060 | x | = | - | 574639 |
| x | = | - | 574639 | ÷ | 1060 |
| = | - | 574639 | × | 1 1060 |
| x | = | - | 574639 1060 |
| x | = | - 542.112264 |