| 4 | ( | 17 | − | 4 | t | ) | − | ( | ( | 4 | − | t | ) | + | ( | t | ( | 17 | − | 4 | t | ) | ) | − | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | ) | × | 1 2 | = | 10 |
| 方程左边 = | 4 | × | 17 | − | 4 | × | 4 | t | − | ( | ( | 4 | − | t | ) | + | ( | t | ( | 17 | − | 4 | t | ) | ) | − | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | ) | × | 1 2 |
| = | 68 | − | 16 | t | − | ( | ( | 4 | − | t | ) | + | ( | t | ( | 17 | − | 4 | t | ) | ) | − | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | ) | × | 1 2 |
| = | 68 | − | 16 | t | − | ( | 4 | − | t | ) | × | 1 2 | − | ( | t | ( | 17 | − | 4 | t | ) | ) | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 68 | − | 16 | t | − | 4 | × | 1 2 | + | t | × | 1 2 | − | ( | t | ( | 17 | − | 4 | t | ) | ) | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 68 | − | 16 | t | − | 2 | + | t | × | 1 2 | − | ( | t | ( | 17 | − | 4 | t | ) | ) | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 31 2 | t | − | ( | t | ( | 17 | − | 4 | t | ) | ) | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 31 2 | t | − | t | ( | 17 | − | 4 | t | ) | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 31 2 | t | − | t | × | 17 | × | 1 2 | + | t | × | 4 | t | × | 1 2 | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 31 2 | t | − | t | × | 17 2 | + | t | × | 2 | t | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 24 | t | + | t | × | 2 | t | + | ( | ( | 16 | − | 4 | t | ) | × | 4 | ) | × | 1 2 |
| = | 66 | − | 24 | t | + | t | × | 2 | t | + | ( | 16 | − | 4 | t | ) | × | 4 | × | 1 2 |
| = | 66 | − | 24 | t | + | t | × | 2 | t | + | ( | 16 | − | 4 | t | ) | × | 2 |
| = | 66 | − | 24 | t | + | t | × | 2 | t | + | 16 | × | 2 | − | 4 | t | × | 2 |
| = | 66 | − | 24 | t | + | t | × | 2 | t | + | 32 | − | 8 | t |
| = | 98 | − | 32 | t | + | t | × | 2 | t |
| 98 | − | 32 | t | + | t | × | 2 | t | = | 10 |