| x | − | x | ÷ | 21 20 | × | 1 20 | − | x | ÷ | 21 20 | × | 1 20 | × | 3 25 | − | x | × | 1 2000 | − | x | × | 1 20 | = | 4500 |
| Left side of the equation = | x | − | x | × | 1 21 | − | x | × | 1 175 | − | x | × | 1 2000 | − | x | × | 1 20 |
| = | 5377 6000 | x |
5377 6000 | x | = | 4500 |
| x | = | 4500 | ÷ | 5377 6000 |
| = | 4500 | × | 6000 5377 |
| x | = | 27000000 5377 |
| x | = | 5021.387391 |