Question

A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number ?
A) 2 B) 4 C) 6 D) 8

Answer 1

Answer:

(D) 8

Step-by-step explanation:

Let the number be x and the resultant be y.

2x+9=y

3y=75

3(2x+9)=75

6x+27=75

6x=75-27

6x=48

$x = \frac{48}{6}$

x=8

Answer 2

Answer:

D) 8

Step-by-step explanation:

8 x 2=16

16+9= 25

and 25 x 3= 75

Hence, no. is 8