| ( | x | − | 8 | ) | ÷ | 30 | = | ( | 10 | − | x | ) | − | 360 |
| x | ÷ | 30 | − | 8 | ÷ | 30 | = | ( | 10 | − | x | ) | − | 360 |
| x | ÷ | 30 | − | 8 | ÷ | 30 | = | 10 | − | x | − | 360 |
| x | × | 1 30 | − | 4 15 | = | 10 | − | x | − | 360 |
1 30 | x | − | 4 15 | = | - | 350 | − | x |
1 30 | x | + | x | = | - | 350 | + | 4 15 |
31 30 | x | = | - | 350 | + | 4 15 |
31 30 | x | = | - | 5246 15 |
| x | = | - | 5246 15 | ÷ | 31 30 |
| = | - | 5246 15 | × | 30 31 |
| = | - | 5246 | × | 2 31 |
| x | = | - | 10492 31 |
| x | = | - 338.451613 |