| ( | ( | x | x | ) | ÷ | 18 25 | ) | × | 1 4 | + | 5 2 | x | = | ( | ( | ( | 18 25 | − | x | ) | ( | 18 25 | − | x | ) | ) | ÷ | 18 25 | ) | × | 1 4 |
| Left side of the equation = | ( | x | x | ) | ÷ | 18 25 | × | 1 4 | + | 5 2 | x |
| = | ( | x | x | ) | × | 25 72 | + | 5 2 | x |
| = | x | x | × | 25 72 | + | 5 2 | x |
| x | x | × | 25 72 | + | 5 2 | x | = | ( | ( | ( | 18 25 | − | x | ) | ( | 18 25 | − | x | ) | ) | ÷ | 18 25 | ) | × | 1 4 |
| Right side of the equation = | ( | ( | 18 25 | − | x | ) | ( | 18 25 | − | x | ) | ) | ÷ | 18 25 | × | 1 4 |
| = | ( | ( | 18 25 | − | x | ) | ( | 18 25 | − | x | ) | ) | × | 25 72 |
| = | ( | 18 25 | − | x | ) | ( | 18 25 | − | x | ) | × | 25 72 |
| = | 18 25 | ( | 18 25 | − | x | ) | × | 25 72 | − | x | ( | 18 25 | − | x | ) | × | 25 72 |
| = | 1 4 | ( | 18 25 | − | x | ) | − | x | ( | 18 25 | − | x | ) | × | 25 72 |
| = | 1 4 | × | 18 25 | − | 1 4 | x | − | x | ( | 18 25 | − | x | ) | × | 25 72 |
| = | 9 50 | − | 1 4 | x | − | x | ( | 18 25 | − | x | ) | × | 25 72 |
| = | 9 50 | − | 1 4 | x | − | x | × | 18 25 | × | 25 72 | + | x | x | × | 25 72 |
| = | 9 50 | − | 1 4 | x | − | x | × | 1 4 | + | x | x | × | 25 72 |
| = | 9 50 | − | 1 2 | x | + | x | x | × | 25 72 |
| x | x | × | 25 72 | + | 5 2 | x | = | 9 50 | − | 1 2 | x | + | x | x | × | 25 72 |
| x= | 3 50 |