| ( | ( | 1500 | − | x | ) | ÷ | 4 | + | 150 | ) | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | = | x |
| Left side of the equation = | ( | 1500 | − | x | ) | ÷ | 4 | × | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 1500 | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 375 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 375 | × | 1 | + | 375 | × | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 375 | + | 1 14 | ( | 1500 | − | x | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 375 | + | 1 14 | × | 1500 | − | 1 14 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 375 | + | 750 7 | − | 1 14 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 1 14 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 1 14 | x | − | x | × | 1 4 | × | 1 | − | x | × | 1 4 | × | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | + | 150 |
| = | 3375 7 | − | 1 14 | x | − | x | × | 1 4 | − | x | × | 1 21000 | ( | 1500 | − | x | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 9 28 | x | − | x | × | 1 21000 | ( | 1500 | − | x | ) | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 9 28 | x | − | x | × | 1 21000 | × | 1500 | + | x | × | 1 21000 | x | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 9 28 | x | − | x | × | 1 14 | + | x | × | 1 21000 | x | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 150 | ( | 1 | + | 2 | ( | 1500 | − | x | ) | ÷ | 10500 | ) |
| = | 3375 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 150 | × | 1 | + | 150 | × | 2 | ( | 1500 | − | x | ) | ÷ | 10500 |
| = | 3375 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 150 | + | 1 35 | ( | 1500 | − | x | ) |
| = | 4425 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 1 35 | ( | 1500 | − | x | ) |
| = | 4425 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 1 35 | × | 1500 | − | 1 35 | x |
| = | 4425 7 | − | 11 28 | x | + | x | × | 1 21000 | x | + | 300 7 | − | 1 35 | x |
| = | 675 | − | 59 140 | x | + | x | × | 1 21000 | x |
| 675 | − | 59 140 | x | + | x | × | 1 21000 | x | = | x |