| ( | 1 | + | k | ) | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | = | 60 |
| 1 | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | = | 60 |
| 1 | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | = | 60 |
| Multiply both sides of the equation by: | ( | 1 | − | 2 | k | ) |
| 1 | ( | 12 | − | 8 | k | ) | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | ( | 1 | − | 2 | k | ) |
| 1 | × | 12 | ( | 1 | − | 2 | k | ) | − | 1 | × | 8 | k | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | ( | 1 | − | 2 | k | ) |
| 1 | × | 12 | ( | 1 | − | 2 | k | ) | − | 1 | × | 8 | k | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | × | 1 | − | 60 | × | 2 | k |
| 12 | ( | 1 | − | 2 | k | ) | − | 8 | k | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| 12 | × | 1 | − | 12 | × | 2 | k | − | 8 | k | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| 12 | − | 24 | k | − | 8 | k | ( | 1 | − | 2 | k | ) | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| 12 | − | 24 | k | − | 8 | k | × | 1 | + | 8 | k | × | 2 | k | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | = | 60 | − | 120 | k |
| 12 | − | 24 | k | − | 8 | k | + | 16 | k | k | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| 12 | − | 32 | k | + | 16 | k | k | + | k | ( | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| 12 | − | 32 | k | + | 16 | k | k | + | k | ( | 12 | − | 8 | k | ) | ÷ | ( | 1 | − | 2 | k | ) | × | ( | 1 | − | 2 | k | ) | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k |
| Multiply both sides of the equation by: | ( | 1 | − | 2 | k | ) |
| 12 | ( | 1 | − | 2 | k | ) | − | 32 | k | ( | 1 | − | 2 | k | ) | + | 16 | k | k | ( | 1 | − | 2 | k | ) | + | k | ( | 12 | − | 8 | k | ) | ( | 1 | − | 2 | k | ) | = | 60 | ( | 1 | − | 2 | k | ) | − | 120 | k | ( | 1 | − | 2 | k | ) |
| 12 | × | 1 | − | 12 | × | 2 | k | − | 32 | k | ( | 1 | − | 2 | k | ) | + | 16 | k | k | ( | 1 | − | 2 | k | ) | = | 60 | ( | 1 | − | 2 | k | ) | − | 120 | k | ( | 1 | − | 2 | k | ) |
| 12 | × | 1 | − | 12 | × | 2 | k | − | 32 | k | ( | 1 | − | 2 | k | ) | + | 16 | k | k | ( | 1 | − | 2 | k | ) | = | 60 | × | 1 | − | 60 | × | 2 | k | − | 120 | k | ( | 1 | − | 2 | k | ) |
| 12 | − | 24 | k | − | 32 | k | ( | 1 | − | 2 | k | ) | + | 16 | k | k | ( | 1 | − | 2 | k | ) | + | k | ( | 12 | − | 8 | k | ) | = | 60 | − | 120 | k | − | 120 | k | ( | 1 | − | 2 | k | ) |
| 12 | − | 24 | k | − | 32 | k | × | 1 | + | 32 | k | × | 2 | k | + | 16 | k | = | 60 | − | 120 | k | − | 120 | k | ( | 1 | − | 2 | k | ) |
| 12 | − | 24 | k | − | 32 | k | × | 1 | + | 32 | k | × | 2 | k | + | 16 | k | = | 60 | − | 120 | k | − | 120 | k | × | 1 | + | 120 | k | × | 2 | k |
| 12 | − | 24 | k | − | 32 | k | + | 64 | k | k | + | 16 | k | k | ( | 1 | − | 2 | k | ) | = | 60 | − | 120 | k | − | 120 | k | + | 240 | k | k |
| 12 | − | 56 | k | + | 64 | k | k | + | 16 | k | k | ( | 1 | − | 2 | k | ) | + | k | ( | 12 | − | 8 | k | ) | = | 60 | − | 240 | k | + | 240 | k | k |
| 12 | − | 56 | k | + | 64 | k | k | + | 16 | k | k | × | 1 | − | 16 | k | = | 60 | − | 240 | k | + | 240 | k | k |
| 12 | − | 56 | k | + | 64 | k | k | + | 16 | k | k | − | 32 | k | k | = | 60 | − | 240 | k | + | 240 | k | k |
| 12 | − | 56 | k | + | 64 | k | k | + | 16 | k | k | − | 32 | k | k | = | 60 | − | 240 | k | + | 240 | k | k |