| 2 | + | ( | X | − | ( | 19 2 | + | X | ÷ | 20 | ) | ) | × | 20 | = | 0 |
| Left side of the equation = | 2 | + | X | × | 20 | − | ( | 19 2 | + | X | ÷ | 20 | ) | × | 20 |
| = | 2 | + | 20 | X | − | 19 2 | × | 20 | − | X | ÷ | 20 | × | 20 |
| = | 2 | + | 20 | X | − | 190 | − | X | × | 1 |
| = | - | 188 | + | 19 | X |
| - | 188 | + | 19 | X | = | 0 |
| 19 | X | = | 0 | + | 188 |
| 19 | X | = | 188 |
| X | = | 188 | ÷ | 19 |
| = | 188 | × | 1 19 |
| X | = | 188 19 |
| X | = | 9.894737 |