Answer:
B
Step-by-step explanation:
First, make all the denominators same.
Then calculate.
Hopefully this helps :D
I believe you may have the order incorrect. If we were looking at g(f(x)) the answer would be 47. We would get this by sticking the 3 in for x in f(x) and solving, which would give us 48. We would then stick that answer in for x in the g(x), giving us 47.
In its current order the answer would be 28.
428,731 - 175,842 = 252,889