| x | − | x | ÷ | 21 20 | × | 3 200 | − | x | ÷ | 21 20 | × | 3 200 | × | 7 100 | × | 1 2 | − | x | ÷ | 21 20 | × | 1 50 | = | 16800 |
| Left side of the equation = | x | − | x | × | 1 70 | − | x | × | 1 2000 | − | x | × | 2 105 |
| = | 5797 6000 | x |
5797 6000 | x | = | 16800 |
| x | = | 16800 | ÷ | 5797 6000 |
| = | 16800 | × | 6000 5797 |
| x | = | 100800000 5797 |
| x | = | 17388.304295 |