| ( | 1 | + | 50 100 | ) | ( | 50 | + | x | ) | = | 2 | x |
| Left side of the equation = | 1 | ( | 50 | + | x | ) | + | 50 100 | ( | 50 | + | x | ) |
| = | 1 | × | 50 | + | 1 | x | + | 50 100 | ( | 50 | + | x | ) |
| = | 50 | + | 1 | x | + | 50 100 | ( | 50 | + | x | ) |
| = | 50 | + | 1 | x | + | 50 100 | × | 50 | + | 50 100 | x |
| = | 50 | + | 1 | x | + | 25 | + | 50 100 | x |
| = | 75 | + | 3 2 | x |
| 75 | + | 3 2 | x | = | 2 | x |
3 2 | x | − | 2 | x | = | - | 75 |
| - | 1 2 | x | = | - | 75 |
| 75 | = | 1 2 | x |
1 2 | x | = | 75 |
| x | = | 75 | ÷ | 1 2 |
| = | 75 | × | 2 |
| x | = | 150 |