| ( | 180 | ( | x | − | 2 | ) | ) | ÷ | x | ÷ | 360 | ÷ | x | = | 13 | ÷ | 2 |
| Multiply both sides of the equation by: | x |
| ( | 180 | ( | x | − | 2 | ) | ) | ÷ | 360 | ÷ | x | = | 13 | ÷ | 2 | × | x |
| 180 | ( | x | − | 2 | ) | ÷ | 360 | ÷ | x | = | 13 | ÷ | 2 | × | x |
1 2 | ( | x | − | 2 | ) | ÷ | x | = | 13 2 | x |
| Multiply both sides of the equation by: | x |
1 2 | ( | x | − | 2 | ) | = | 13 2 | x | x |
1 2 | x | − | 1 2 | × | 2 | = | 13 2 | x | x |
1 2 | x | − | 1 | = | 13 2 | x | x |