| ( | ( | 2500 | − | x | ) | ÷ | 4 | + | 300 | ) | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | = | x |
| Left side of the equation = | ( | 2500 | − | x | ) | ÷ | 4 | × | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 2500 | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 625 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 625 | × | 1 | + | 625 | × | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 625 | + | 5 7 | ( | 2500 | − | x | ) | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 625 | + | 5 7 | × | 2500 | − | 5 7 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 625 | + | 12500 7 | − | 5 7 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 5 7 | x | − | x | × | 1 4 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 5 7 | x | − | x | × | 1 4 | × | 1 | − | x | × | 1 4 | × | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | + | 300 |
| = | 16875 7 | − | 5 7 | x | − | x | × | 1 4 | − | x | × | 1 3500 | ( | 2500 | − | x | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 27 28 | x | − | x | × | 1 3500 | ( | 2500 | − | x | ) | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 27 28 | x | − | x | × | 1 3500 | × | 2500 | + | x | × | 1 3500 | x | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 27 28 | x | − | x | × | 5 7 | + | x | × | 1 3500 | x | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 300 | ( | 1 | + | 2 | ( | 2500 | − | x | ) | ÷ | 1750 | ) |
| = | 16875 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 300 | × | 1 | + | 300 | × | 2 | ( | 2500 | − | x | ) | ÷ | 1750 |
| = | 16875 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 300 | + | 12 35 | ( | 2500 | − | x | ) |
| = | 18975 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 12 35 | ( | 2500 | − | x | ) |
| = | 18975 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 12 35 | × | 2500 | − | 12 35 | x |
| = | 18975 7 | − | 47 28 | x | + | x | × | 1 3500 | x | + | 6000 7 | − | 12 35 | x |
| = | 24975 7 | − | 283 140 | x | + | x | × | 1 3500 | x |
24975 7 | − | 283 140 | x | + | x | × | 1 3500 | x | = | x |