If 2 to the 1998 power - 2 to the 1997 power - 2 to the 1996 power + 2 to the 1995 power = k times 2 to the 1995 power, what is the value of k?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
Doesn't this simply to
8*z -4 z - 2z + z = k z
You need to show some work or thinking.