| 21 | ( | 2050 | ÷ | 3 | − | 1 | ÷ | 5 | × | x | ) | = | 29 | ( | 2050 | ÷ | 3 | − | 1 | ÷ | 3 | × | x | ) |
| Left side of the equation = | 21 | × | 2050 | ÷ | 3 | − | 21 | × | 1 | ÷ | 5 | × | x |
| = | 14350 | − | 21 5 | x |
| 14350 | − | 21 5 | x | = | 29 | ( | 2050 | ÷ | 3 | − | 1 | ÷ | 3 | × | x | ) |
| Right side of the equation = | 29 | × | 2050 | ÷ | 3 | − | 29 | × | 1 | ÷ | 3 | × | x |
| = | 59450 3 | − | 29 3 | x |
| 14350 | − | 21 5 | x | = | 59450 3 | − | 29 3 | x |
| - | 21 5 | x | + | 29 3 | x | = | 59450 3 | − | 14350 |
82 15 | x | = | 59450 3 | − | 14350 |
82 15 | x | = | 16400 3 |
| x | = | 16400 3 | ÷ | 82 15 |
| = | 16400 3 | × | 15 82 |
| = | 200 | × | 5 |
| x | = | 1000 |