| x | ÷ | 800 | + | x | ÷ | 1200 | + | 15 | ÷ | 9600 | + | 3 | ÷ | 8 | = | 0 |
| Left side of the equation = | x | × | 1 800 | + | x | × | 1 1200 | + | 1 640 | + | 3 8 |
| = | 1 480 | x | + | 241 640 |
1 480 | x | + | 241 640 | = | 0 |
1 480 | x | = | 0 | − | 241 640 |
1 480 | x | = | - | 241 640 |
| x | = | - | 241 640 | ÷ | 1 480 |
| = | - | 241 640 | × | 480 |
| = | - | 241 4 | × | 3 |
| x | = | - | 723 4 |
| x | = | - 180.75 |