What number could replace x to make a true statement?
2/3 < x/8 < 7/8
Get a common denominator so that it is easier to make comparisons between the numerators
16/24 < 3x/24 < 21/24
i.e. we need 16 < 3x < 21
for which we need 5 < x < 7 (i.e. 15 < 3x < 21)
The only option is x = 6
Answer: x = 6 (D)