| 180 | = | 360 | ÷ | ( | 227 | ÷ | ( | 81 | + | 68 | + | X | ) | ÷ | 2 | ) |
| Multiply both sides of the equation by: | ( | 227 | ÷ | ( | 81 | + | 68 | + | X | ) | ÷ | 2 | ) |
| 180 | ( | 227 | ÷ | ( | 81 | + | 68 | + | X | ) | ÷ | 2 | ) | = | 360 |
| 180 | × | 227 | ÷ | ( | 81 | + | 68 | + | X | ) | ÷ | 2 | = | 360 |
| 20430 | ÷ | ( | 81 | + | 68 | + | X | ) | = | 360 |
| Multiply both sides of the equation by: | ( | 81 | + | 68 | + | X | ) |
| 20430 | = | 360 | ( | 81 | + | 68 | + | X | ) |
| 20430 | = | 360 | × | 81 | + | 360 | × | 68 | + | 360 | X |
| 20430 | = | 29160 | + | 24480 | + | 360 | X |
| 20430 | = | 53640 | + | 360 | X |
| - | 360 | X | = | 53640 | − | 20430 |
| - | 360 | X | = | 33210 |
| - | 33210 | = | 360 | X |
| 360 | X | = | - | 33210 |
| X | = | - | 33210 | ÷ | 360 |
| = | - | 33210 | × | 1 360 |
| = | - | 369 | × | 1 4 |
| X | = | - | 369 4 |
| X | = | - 92.25 |