| 1 | ÷ | 10 | × | ( | x | − | ( | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | ) | + | 300 | ) | = | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) |
| Left side of the equation = | 1 10 | ( | x | − | ( | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | ) | + | 300 | ) |
1 10 | ( | x | − | ( | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | ) | + | 300 | ) | = | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) |
| Left side of the equation = | 1 10 | x | − | 1 10 | ( | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | ) | + | 1 10 | × | 300 |
| = | 1 10 | x | − | 1 10 | ( | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | ) | + | 30 |
| = | 1 10 | x | − | 1 10 | × | 200 | − | 1 10 | × | 1 | ÷ | 10 | × | ( | x | − | 200 | ) | + | 30 |
| = | 1 10 | x | − | 20 | − | 1 100 | ( | x | − | 200 | ) | + | 30 |
| = | 1 10 | x | + | 10 | − | 1 100 | ( | x | − | 200 | ) |
| = | 1 10 | x | + | 10 | − | 1 100 | x | + | 1 100 | × | 200 |
| = | 1 10 | x | + | 10 | − | 1 100 | x | + | 2 |
| = | 9 100 | x | + | 12 |
9 100 | x | + | 12 | = | 200 | + | 1 | ÷ | 10 | × | ( | x | − | 200 | ) |
| Right side of the equation = | 200 | + | 1 10 | ( | x | − | 200 | ) |
9 100 | x | + | 12 | = | 200 | + | 1 10 | ( | x | − | 200 | ) |
| Right side of the equation = | 200 | + | 1 10 | x | − | 1 10 | × | 200 |
| = | 200 | + | 1 10 | x | − | 20 |
| = | 180 | + | 1 10 | x |
9 100 | x | + | 12 | = | 180 | + | 1 10 | x |
9 100 | x | − | 1 10 | x | = | 180 | − | 12 |
| - | 1 100 | x | = | 180 | − | 12 |
| - | 1 100 | x | = | 168 |
| - | 168 | = | 1 100 | x |
1 100 | x | = | - | 168 |
| x | = | - | 168 | ÷ | 1 100 |
| = | - | 168 | × | 100 |
| x | = | - | 16800 |