Answer:
The answer is D: the number of candies in a box.
Step-by-step explanation:
The discriminant is

which is 0.
Since the discriminant is 0, there is only one real solution.
X=7
7x-2=5x+12
+2. +2
7x=5x+14
-5x -5x
2x=14
÷2 ÷2
x=7
4c + 36 because you have to multiple 4 x c which is 4c and then you have to multiply 4 by 9 which gives 4c + 36 (hope this helps)