I'm assuming by the answer choices that you're question is:
-1/3x > 5
Isolate the x. Multiply -3 to both sides
(-3)(-1/3)x > 5(-3)
x > 5(-3)
Remember to flip the sign when you multiply by a negative number
x > 5(-3)
Multiply
x < -15
x < -15, or (A) is your answer
hope this helps
~Rise Above the Ordinary