| 35 | ( | 405 2 | x | − | 1500 | ) | + | 15 | ( | 182 5 | × | 75 | − | 2500 | ) | = | 90000 | × | 17 200 |
| Left side of the equation = | 35 | × | 405 2 | x | − | 35 | × | 1500 | + | 15 | ( | 182 5 | × | 75 | − | 2500 | ) |
| = | 14175 2 | x | − | 52500 | + | 15 | ( | 182 5 | × | 75 | − | 2500 | ) |
| = | 14175 2 | x | − | 52500 | + | 15 | × | 182 5 | × | 75 | − | 15 | × | 2500 |
| = | 14175 2 | x | − | 52500 | + | 40950 | − | 37500 |
| = | 14175 2 | x | − | 49050 |
14175 2 | x | − | 49050 | = | 90000 | × | 17 200 |
| Right side of the equation = | 7650 |
14175 2 | x | − | 49050 | = | 7650 |
14175 2 | x | = | 7650 | + | 49050 |
14175 2 | x | = | 56700 |
| x | = | 56700 | ÷ | 14175 2 |
| = | 56700 | × | 2 14175 |
| = | 4 | × | 2 |
| x | = | 8 |