| ( | 1450 | ÷ | 57 | − | x | ) | ( | 1450 | + | x | ) | = | 100 | ( | 1450 | + | 1450 | ÷ | 57 | ) |
| Left side of the equation = | 1450 | ÷ | 57 | × | ( | 1450 | + | x | ) | − | x | ( | 1450 | + | x | ) |
| = | 1450 57 | ( | 1450 | + | x | ) | − | x | ( | 1450 | + | x | ) |
| = | 1450 57 | × | 1450 | + | 1450 57 | x | − | x | ( | 1450 | + | x | ) |
| = | 2102500 57 | + | 1450 57 | x | − | x | ( | 1450 | + | x | ) |
| = | 2102500 57 | + | 1450 57 | x | − | x | × | 1450 | − | x | x |
| = | 2102500 57 | − | 81200 57 | x | − | x | x |
2102500 57 | − | 81200 57 | x | − | x | x | = | 100 | ( | 1450 | + | 1450 | ÷ | 57 | ) |
| Right side of the equation = | 100 | × | 1450 | + | 100 | × | 1450 | ÷ | 57 |
| = | 145000 | + | 145000 57 |
| = | 8410000 57 |
2102500 57 | − | 81200 57 | x | − | x | x | = | 8410000 57 |