| X | − | 1 20 | X | − | 3 20 | X | − | 3 50 | X | − | 3 20 | X | × | 1 4 | − | 117400 | = | 0 |
| Left side of the equation = | X | − | 1 20 | X | − | 3 20 | X | − | 3 50 | X | − | 3 80 | X | − | 117400 |
| = | 281 400 | X | − | 117400 |
281 400 | X | − | 117400 | = | 0 |
281 400 | X | = | 0 | + | 117400 |
281 400 | X | = | 117400 |
| X | = | 117400 | ÷ | 281 400 |
| = | 117400 | × | 400 281 |
| X | = | 46960000 281 |
| X | = | 167117.437722 |