| X | − | 1 20 | X | − | 1 20 | X | − | 3 50 | X | − | 1 20 | X | × | 1 4 | − | 117400 | = | 0 |
| Left side of the equation = | X | − | 1 20 | X | − | 1 20 | X | − | 3 50 | X | − | 1 80 | X | − | 117400 |
| = | 331 400 | X | − | 117400 |
331 400 | X | − | 117400 | = | 0 |
331 400 | X | = | 0 | + | 117400 |
331 400 | X | = | 117400 |
| X | = | 117400 | ÷ | 331 400 |
| = | 117400 | × | 400 331 |
| X | = | 46960000 331 |
| X | = | 141873.111782 |