| 6 | ( | 11 2 | − | 4 | + | 12 | − | p | + | 7 | ) | + | 10 | = | 4 | ( | 11 2 | − | 4 | ) | + | 10 | × | 12 | × | 9 10 | − | 10 | p | + | 10 | × | 7 | × | 9 10 |
| Left side of the equation = | 6 | × | 11 2 | − | 6 | × | 4 | + | 6 | × | 12 | − | 6 | p | + | 6 | × | 7 | + | 10 |
| = | 33 | − | 24 | + | 72 | − | 6 | p | + | 42 | + | 10 |
| = | 133 | − | 6 | p |
| 133 | − | 6 | p | = | 4 | ( | 11 2 | − | 4 | ) | + | 10 | × | 12 | × | 9 10 | − | 10 | p | + | 10 | × | 7 | × | 9 10 |
| Right side of the equation = | 4 | ( | 11 2 | − | 4 | ) | + | 108 | − | 10 | p | + | 63 |
| = | 4 | ( | 11 2 | − | 4 | ) | + | 171 | − | 10 | p |
| 133 | − | 6 | p | = | 4 | ( | 11 2 | − | 4 | ) | + | 171 | − | 10 | p |
| Right side of the equation = | 4 | × | 11 2 | − | 4 | × | 4 | + | 171 | − | 10 | p |
| = | 22 | − | 16 | + | 171 | − | 10 | p |
| = | 177 | − | 10 | p |
| 133 | − | 6 | p | = | 177 | − | 10 | p |
| - | 6 | p | + | 10 | p | = | 177 | − | 133 |
| 4 | p | = | 177 | − | 133 |
| 4 | p | = | 44 |
| p | = | 44 | ÷ | 4 |
| = | 44 | × | 1 4 |
| = | 11 | × | 1 |
| p | = | 11 |