| ( | ( | X | − | 0 | ) | ( | 1 | − | 25 100 | ) | ) | ÷ | 150 | = | ( | ( | X | − | 50 | ) | ( | 1 | − | 25 100 | ) | ) | ÷ | 100 |
| Left side of the equation = | ( | X | − | 0 | ) | ( | 1 | − | 25 100 | ) | × | 1 150 |
| = | X | ( | 1 | − | 25 100 | ) | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) | × | 1 150 |
| = | X | ( | 1 | − | 25 100 | ) | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | X | × | 1 | × | 1 150 | − | X | × | 25 100 | × | 1 150 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | X | × | 1 150 | − | X | × | 1 600 | − | 0 | ( | 1 | − | 25 100 | ) |
| = | 1 200 | X | − | 0 | ( | 1 | − | 25 100 | ) |
| = | 1 200 | X | − | 0 | × | 1 | + | 0 | × | 25 100 |
| = | 1 200 | X | − | 0 | + | 0 |
| = | 1 200 | X | − | 0 |
1 200 | X | − | 0 | = | ( | ( | X | − | 50 | ) | ( | 1 | − | 25 100 | ) | ) | ÷ | 100 |
| Right side of the equation = | ( | X | − | 50 | ) | ( | 1 | − | 25 100 | ) | × | 1 100 |
| = | X | ( | 1 | − | 25 100 | ) | × | 1 100 | − | 50 | ( | 1 | − | 25 100 | ) | × | 1 100 |
| = | X | ( | 1 | − | 25 100 | ) | × | 1 100 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | X | × | 1 | × | 1 100 | − | X | × | 25 100 | × | 1 100 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | X | × | 1 100 | − | X | × | 1 400 | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | 3 400 | X | − | 1 2 | ( | 1 | − | 25 100 | ) |
| = | 3 400 | X | − | 1 2 | × | 1 | + | 1 2 | × | 25 100 |
| = | 3 400 | X | − | 1 2 | + | 1 8 |
| = | 3 400 | X | − | 3 8 |
1 200 | X | = | 3 400 | X | − | 3 8 |
1 200 | X | − | 3 400 | X | = | - | 3 8 |
| - | 1 400 | X | = | - | 3 8 |
3 8 | = | 1 400 | X |
1 400 | X | = | 3 8 |
| X | = | 3 8 | ÷ | 1 400 |
| = | 3 8 | × | 400 |
| = | 3 | × | 50 |
| X | = | 150 |