| 71 | x | ÷ | ( | 100 | + | 90 | x | − | 20 | ) | = | ( | 71 | x | + | 22 5 | ) | ÷ | ( | 528 5 | + | 9 | x | ) |
| Multiply both sides of the equation by: | ( | 100 | + | 90 | x | − | 20 | ) | , | ( | 528 5 | + | 9 | x | ) |
| 71 | x | ( | 528 5 | + | 9 | x | ) | = | ( | 71 | x | + | 22 5 | ) | ( | 100 | + | 90 | x | − | 20 | ) |
| 71 | x | × | 528 5 | + | 71 | x | × | 9 | x | = | ( | 71 | x | + | 22 5 | ) | ( | 100 | + | 90 | x | − | 20 | ) |
| 71 | x | × | 528 5 | + | 71 | x | × | 9 | x | = | 71 | x | ( | 100 | + | 90 | x | − | 20 | ) | + | 22 5 | ( | 100 | + | 90 | x | − | 20 | ) |
37488 5 | x | + | 639 | x | x | = | 71 | x | ( | 100 | + | 90 | x | − | 20 | ) | + | 22 5 | ( | 100 | + | 90 | x | − | 20 | ) |
37488 5 | x | + | 639 | x | x | = | 71 | x | × | 100 | + | 71 | x | × | 90 | x | − | 71 | x | × | 20 | + | 22 5 | ( | 100 | + | 90 | x | − | 20 | ) |
37488 5 | x | + | 639 | x | x | = | 7100 | x | + | 6390 | x | x | − | 1420 | x | + | 22 5 | ( | 100 | + | 90 | x | − | 20 | ) |
37488 5 | x | + | 639 | x | x | = | 5680 | x | + | 6390 | x | x | + | 22 5 | ( | 100 | + | 90 | x | − | 20 | ) |
37488 5 | x | + | 639 | x | x | = | 5680 | x | + | 6390 | x | x | + | 22 5 | × | 100 | + | 22 5 | × | 90 | x | − | 22 5 | × | 20 |
37488 5 | x | + | 639 | x | x | = | 5680 | x | + | 6390 | x | x | + | 440 | + | 396 | x | − | 88 |
37488 5 | x | + | 639 | x | x | = | 6076 | x | + | 6390 | x | x | + | 352 |