A number is doubled and 9 is added, If the resultant is tripled, it becomes 75. What is the number ?

A. 6

B. 3.5

C. 8

D. None of these

Answer: Option C

Solution(By Examveda Team)

$$\eqalign{ & {\text{Let the number is }}x{\text{}} \cr & {\text{According to question,}} \cr & {\text{3}}\left( {2x + 9} \right) = 75 \cr & 2x + 9 = 25 \cr & x = \frac{{16}}{2} \cr & x = 8 \cr} $$