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Re: If w, x, y, and z are real numbers, each of the following eq
[#permalink]
02 Jan 2020, 09:18
Notice that the Question is EXCEPT question. So, DO NOT answer in a hurry and mark option A!
Easiest way to solve this is to open the brackets in the question stem and also in the option choices
w(x + y + z) = wx + wy + wz
Taking each option now:
(A) wx+wy+wz
Same as Question
(B) (x+y+z)w
Opening bracket we get wx + wy + wz, Same as Question
(C) wx+w(y+z)
Opening bracket we get wx + wy + wz, Same as Question
(D) 3w+x+y+z
This is not equal to question
(E) w(x+y)+wz
Opening bracket we get wx + wy + wz, Same as Question
So, answer is D.
Hope it helps!