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If x = 5 and y = -2 , then x -2y =9, the...

If x = 5 and y = -2 , then x -2y =9, the contrapositive of this proposition is

A

If `x - 2y != 9`, then `x!= 5` or `y != -2`

B

If `x - 2y = 9, x != 5` and `y != -2`

C

`x - 2y = 9` is and only if x = 5 and y = -2

D

x - 2y = 9 if and only if x = 0 and y = 9

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