| ( | 1 1000 | + | x | ) | = | 16 5 | ( | 1 100 | − | x | ) | ( | 1 10 | − | x | ) |
| Left side of the equation = | 1 1000 | + | x |
1 1000 | + | x | = | 16 5 | ( | 1 100 | − | x | ) | ( | 1 10 | − | x | ) |
| Right side of the equation = | 16 5 | × | 1 100 | ( | 1 10 | − | x | ) | − | 16 5 | x | ( | 1 10 | − | x | ) |
| = | 4 125 | ( | 1 10 | − | x | ) | − | 16 5 | x | ( | 1 10 | − | x | ) |
| = | 4 125 | × | 1 10 | − | 4 125 | x | − | 16 5 | x | ( | 1 10 | − | x | ) |
| = | 2 625 | − | 4 125 | x | − | 16 5 | x | ( | 1 10 | − | x | ) |
| = | 2 625 | − | 4 125 | x | − | 16 5 | x | × | 1 10 | + | 16 5 | x | x |
| = | 2 625 | − | 4 125 | x | − | 8 25 | x | + | 16 5 | x | x |
| = | 2 625 | − | 44 125 | x | + | 16 5 | x | x |
1 1000 | + | x | = | 2 625 | − | 44 125 | x | + | 16 5 | x | x |