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If x and y are positive integers and x+3y=19, which of the f

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If x and y are positive integers and x+3y=19, which of the f [#permalink] New post 24 Jun 2020, 10:26
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If x and y are positive integers and x+3y=19, which of the following are possible value of x ??

Indicate all such values


A. 1

B. 2

C. 3

D. 4

E. 5

F. 6

G. 7

H. 8
[Reveal] Spoiler: OA

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Re: If x and y are positive integers and x+3y=19, which of the f [#permalink] New post 24 Jun 2020, 10:26
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Re: If x and y are positive integers and x+3y=19, which of the f [#permalink] New post 24 Jun 2020, 16:05
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x + 3 y = 19

Note that 3y is a multiple of 3.
Multiples of 3 less than 19 = 3, 6, 9 , 12, 15, 18

Since the answer options have an upper limit of 8, we need not worry about 3,6,9 since [ 9 + 8 = 17 < 19]

12 + x = 19 -> x = 7
15 + x = 19 -> x = 4
18 + x = 19 -> x = 1

The correct answers are then 1, 4, 7 which correspond to letters A, D, G.
Re: If x and y are positive integers and x+3y=19, which of the f   [#permalink] 24 Jun 2020, 16:05
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If x and y are positive integers and x+3y=19, which of the f

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