| 5 | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | ÷ | ( | 128 | + | x | ) | = | 19 4 |
| Multiply both sides of the equation by: | ( | 128 | + | x | ) |
| 5 | ( | 128 | + | x | ) | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 19 4 | ( | 128 | + | x | ) |
| 5 | × | 128 | ( | 128 | + | x | ) | + | 5 | x | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 19 4 | ( | 128 | + | x | ) |
| 5 | × | 128 | ( | 128 | + | x | ) | + | 5 | x | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 19 4 | × | 128 | + | 19 4 | x |
| 640 | ( | 128 | + | x | ) | + | 5 | x | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 640 | × | 128 | + | 640 | x | + | 5 | x | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 81920 | + | 640 | x | + | 5 | x | ( | 128 | + | x | ) | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 81920 | + | 640 | x | + | 5 | x | × | 128 | + | 5 | x | x | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 81920 | + | 640 | x | + | 640 | x | + | 5 | x | x | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 81920 | + | 1280 | x | + | 5 | x | x | + | ( | 1 | × | 7 | ) | = | 608 | + | 19 4 | x |
| 81920 | + | 1280 | x | + | 5 | x | x | + | 1 | × | 7 | = | 608 | + | 19 4 | x |
| 81920 | + | 1280 | x | + | 5 | x | x | + | 7 | = | 608 | + | 19 4 | x |
| 81927 | + | 1280 | x | + | 5 | x | x | = | 608 | + | 19 4 | x |