| X | − | ( | 3 100 | X | + | 3 25 | × | 3 100 | X | + | 3 1000 | X | + | 1 20 | X | ) | = | 200000 |
| Left side of the equation = | X | − | 3 100 | X | − | 3 25 | × | 3 100 | X | − | 3 1000 | X | − | 1 20 | X |
| = | X | − | 3 100 | X | − | 9 2500 | X | − | 3 1000 | X | − | 1 20 | X |
| = | 4567 5000 | X |
4567 5000 | X | = | 200000 |
| X | = | 200000 | ÷ | 4567 5000 |
| = | 200000 | × | 5000 4567 |
| X | = | 1000000000 4567 |
| X | = | 218962.119553 |