| ( | x | ( | 1 | − | 2 100 | ) | + | 6 | ) | × | 10 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) | = | 174 |
| Left side of the equation = | x | ( | 1 | − | 2 100 | ) | × | 10 | + | 6 | × | 10 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) |
| = | x | ( | 1 | − | 2 100 | ) | × | 10 | + | 60 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) |
| = | x | × | 1 | × | 10 | − | x | × | 2 100 | × | 10 | + | 60 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) |
| = | x | × | 10 | − | x | × | 1 5 | + | 60 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) |
| = | 49 5 | x | + | 60 | − | ( | 10 | x | ( | 1 | − | 10 100 | ) | + | 6 | ) |
| = | 49 5 | x | + | 60 | − | 10 | x | ( | 1 | − | 10 100 | ) | − | 6 |
| = | 49 5 | x | + | 54 | − | 10 | x | ( | 1 | − | 10 100 | ) |
| = | 49 5 | x | + | 54 | − | 10 | x | × | 1 | + | 10 | x | × | 10 100 |
| = | 49 5 | x | + | 54 | − | 10 | x | + | 1 | x |
| = | 4 5 | x | + | 54 |
4 5 | x | + | 54 | = | 174 |
4 5 | x | = | 174 | − | 54 |
4 5 | x | = | 120 |
| x | = | 120 | ÷ | 4 5 |
| = | 120 | × | 5 4 |
| = | 30 | × | 5 |
| x | = | 150 |