(a−b)/2 =3 and xa − xb = 12, then x =

Question

(A) −1 (B) 1 (C) 2 (D) 4 (E) It cannot be determined from the information given.

i got c

Answer 1

xa-xb = x(a-b) = 12
a-b = 2*3 = 6
x = x(a-b)/(a-b) = 12/6 = 2