i believe your answers would be
1/2c+7 and 2H-9
F should be -1, 6
E should be -4, 2
D should be -4, 9
Sorry there isn't. I have experienced the same thing before an unfortunately I was not able to view the question after it was deleted. Sorry again :(
The answer is x=21
16-x=-5
-16 16
0 21
X = 21
