| - | 18 | ( | 26 | − | 6 | x | ) | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) | + | 12 | × | 17 | = | 0 |
| Left side of the equation = | - | 18 | ( | 26 | − | 6 | x | ) | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) | + | 204 |
| - | 18 | ( | 26 | − | 6 | x | ) | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) | + | 204 | = | 0 |
| Left side of the equation = | - | 18 | × | 26 | + | 18 | × | 6 | x | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) | + | 204 |
| = | - | 468 | + | 108 | x | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) | + | 204 |
| = | - | 264 | + | 108 | x | + | ( | 38 | − | 12 | x | ) | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 264 | + | 108 | x | + | 38 | ( | - | 12 | ) | − | 12 | x | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 264 | + | 108 | x | − | 38 | × | 12 | − | 12 | x | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 264 | + | 108 | x | − | 456 | − | 12 | x | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 108 | x | − | 12 | x | ( | - | 12 | ) | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 108 | x | + | 12 | x | × | 12 | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 108 | x | + | 144 | x | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 252 | x | + | 6 | ( | 38 | − | 12 | x | ) | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 252 | x | + | 6 | × | 38 | − | 6 | × | 12 | x | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 720 | + | 252 | x | + | 228 | − | 72 | x | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 492 | + | 180 | x | + | 12 | ( | 26 | − | 6 | x | ) |
| = | - | 492 | + | 180 | x | + | 12 | × | 26 | − | 12 | × | 6 | x |
| = | - | 492 | + | 180 | x | + | 312 | − | 72 | x |
| = | - | 180 | + | 108 | x |
| - | 180 | + | 108 | x | = | 0 |
| 108 | x | = | 0 | + | 180 |
| 108 | x | = | 180 |
| x | = | 180 | ÷ | 108 |
| = | 180 | × | 1 108 |
| = | 5 | × | 1 3 |
| x | = | 5 3 |
| x | = | 1.666667 |