| ( | x | ÷ | ( | x | + | 13000 | ) | ) | ÷ | ( | ( | x | − | 21000 | ) | ÷ | ( | x | − | 8000 | ) | ) | = | 23 20 |
| Multiply both sides of the equation by: | ( | ( | x | − | 21000 | ) | ÷ | ( | x | − | 8000 | ) | ) |
| ( | x | ÷ | ( | x | + | 13000 | ) | ) | = | 23 20 | ( | ( | x | − | 21000 | ) | ÷ | ( | x | − | 8000 | ) | ) |
| x | ÷ | ( | x | + | 13000 | ) | = | 23 20 | ( | ( | x | − | 21000 | ) | ÷ | ( | x | − | 8000 | ) | ) |
| x | ÷ | ( | x | + | 13000 | ) | = | 23 20 | ( | x | − | 21000 | ) | ÷ | ( | x | − | 8000 | ) |
| Multiply both sides of the equation by: | ( | x | + | 13000 | ) | , | ( | x | − | 8000 | ) |
| x | ( | x | − | 8000 | ) | = | 23 20 | ( | x | − | 21000 | ) | ( | x | + | 13000 | ) |
| x | x | − | x | × | 8000 | = | 23 20 | ( | x | − | 21000 | ) | ( | x | + | 13000 | ) |
| x | x | − | x | × | 8000 | = | 23 20 | x | ( | x | + | 13000 | ) | − | 23 20 | × | 21000 | ( | x | + | 13000 | ) |
| x | x | − | x | × | 8000 | = | 23 20 | x | ( | x | + | 13000 | ) | − | 24150 | ( | x | + | 13000 | ) |
| x | x | − | 8000 | x | = | 23 20 | x | x | + | 23 20 | x | × | 13000 | − | 24150 | ( | x | + | 13000 | ) |
| x | x | − | 8000 | x | = | 23 20 | x | x | + | 14950 | x | − | 24150 | ( | x | + | 13000 | ) |
| x | x | − | 8000 | x | = | 23 20 | x | x | + | 14950 | x | − | 24150 | x | − | 24150 | × | 13000 |
| x | x | − | 8000 | x | = | 23 20 | x | x | + | 14950 | x | − | 24150 | x | − | 313950000 |
| x | x | − | 8000 | x | = | 23 20 | x | x | − | 9200 | x | − | 313950000 |