| 36000 | − | 36000 | × | 3 100 | = | 36000 | + | x | − | ( | 36000 | + | x | ) | × | 1 10 | + | 20 |
| Left side of the equation = | 36000 | − | 1080 |
| = | 34920 |
| 34920 | = | 36000 | + | x | − | ( | 36000 | + | x | ) | × | 1 10 | + | 20 |
| Right side of the equation = | 36020 | + | x | − | ( | 36000 | + | x | ) | × | 1 10 |
| 34920 | = | 36020 | + | x | − | ( | 36000 | + | x | ) | × | 1 10 |
| Right side of the equation = | 36020 | + | x | − | 36000 | × | 1 10 | − | x | × | 1 10 |
| = | 36020 | + | x | − | 3600 | − | x | × | 1 10 |
| = | 32420 | + | 9 10 | x |
| 34920 | = | 32420 | + | 9 10 | x |
| - | 9 10 | x | = | 32420 | − | 34920 |
| - | 9 10 | x | = | - | 2500 |
| 2500 | = | 9 10 | x |
9 10 | x | = | 2500 |
| x | = | 2500 | ÷ | 9 10 |
| = | 2500 | × | 10 9 |
| x | = | 25000 9 |
| x | = | 2777.777778 |