Flannery is 28 years old and Harumi is 11 years old. In how many years will Flannery’s age be twice Harumi’s age?

[Vincen]

Flannery is 28 years old and Harumi is 11 years old. In how many years will Flannery’s age be twice Harumi’s age?

(A) 3
(B) 4
(C) 6
(D) 8
(E) 9

[spoiler]OA=C[/spoiler]

Source: Manhattan GMAT

[Scott@TargetTestPrep]

Flannery is 28 years old and Harumi is 11 years old. In how many years will Flannery’s age be twice Harumi’s age?

(A) 3
(B) 4
(C) 6
(D) 8
(E) 9

[spoiler]OA=C[/spoiler]

Let x be the number of years from now so that Flannery’s age will be twice Harumi’s age. We can create the equation:

28 + x = 2(11 + x)

28 + x = 22 + 2x

6 = x

Answer: C