| 18 | ( | 65 | − | x | ) | + | 55 2 | x | = | 65 | × | 253 10 |
| Left side of the equation = | 18 | × | 65 | − | 18 | x | + | 55 2 | x |
| = | 1170 | − | 18 | x | + | 55 2 | x |
| = | 1170 | + | 19 2 | x |
| 1170 | + | 19 2 | x | = | 65 | × | 253 10 |
| Right side of the equation = | 3289 2 |
| 1170 | + | 19 2 | x | = | 3289 2 |
19 2 | x | = | 3289 2 | − | 1170 |
19 2 | x | = | 949 2 |
| x | = | 949 2 | ÷ | 19 2 |
| = | 949 2 | × | 2 19 |
| = | 949 | × | 1 19 |
| x | = | 949 19 |
| x | = | 49.947368 |