Bunuel wrote:
If x and y are integers and 2x–y= 11, then 4x+ y CANNOT be
(A) –5
(B) 1
(C) 13
(D) 17
(E) 55
If x and y are integers and 2x–y= 11
2x - 11 = y
now just get the values for x and y, they are integers you can plug in
x-----y
1-----(-9)
2-----(-7)
3-----(-5)
4-----(-3)
5-----(-1)
Now just substitute them back and get the value which is not possible
16 - 3 = 13
20 - 1 = 19
D doesn't exist.
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