| - | 12500 | + | x | − | ( | 50000 | + | x | ) | × | 1 100 | = | 5000 |
| Left side of the equation = | - | 12500 | + | x | − | 50000 | × | 1 100 | − | x | × | 1 100 |
| = | - | 12500 | + | x | − | 500 | − | x | × | 1 100 |
| = | - | 13000 | + | 99 100 | x |
| - | 13000 | + | 99 100 | x | = | 5000 |
99 100 | x | = | 5000 | + | 13000 |
99 100 | x | = | 18000 |
| x | = | 18000 | ÷ | 99 100 |
| = | 18000 | × | 100 99 |
| = | 2000 | × | 100 11 |
| x | = | 200000 11 |
| x | = | 18181.818182 |