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xy + z = x(y+z)steinbock wrote:If xy + z = x(y+z), which of the following must be true?
A) x=0 and z=0
B) x=1 and y=1
C) y=1 and z=0
D) x=1 and y=0
E) x=1 and z=0
OA is E
Can someone please provide an explanation? Thanks.
Can someone plz. help me understand this problem.steinbock wrote:If xy + z = x(y+z), which of the following must be true?
A) x=0 and z=0
B) x=1 and y=1
C) y=1 and z=0
D) x=1 and y=0
E) x=1 and z=0
OA is E
Can someone please provide an explanation? Thanks.
Two things:gmat009 wrote:Can someone plz. help me understand this problem.steinbock wrote:If xy + z = x(y+z), which of the following must be true?
A) x=0 and z=0
B) x=1 and y=1
C) y=1 and z=0
D) x=1 and y=0
E) x=1 and z=0
OA is E
Can someone please provide an explanation? Thanks.
I am getting z(1-x)=0
Therefore , z=0 or x=1
Also xy=0 as it got cancelled from both sides.
So if x=1 then y=0 to get xy=0
So I am getting ans D instead of E
Hi Logitech,logitech wrote:Two things:gmat009 wrote:Can someone plz. help me understand this problem.steinbock wrote:If xy + z = x(y+z), which of the following must be true?
A) x=0 and z=0
B) x=1 and y=1
C) y=1 and z=0
D) x=1 and y=0
E) x=1 and z=0
OA is E
Can someone please provide an explanation? Thanks.
I am getting z(1-x)=0
Therefore , z=0 or x=1
Also xy=0 as it got cancelled from both sides.
So if x=1 then y=0 to get xy=0
So I am getting ans D instead of E
1) XY did not cancelled becaused it was equal to ZERO, but it was at the both side of the equation
bla bla + XY = cha cha + XY
Bla bla = Cha CHa
2) You are solving the equation for Z and X so choose E
