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If ` (7x+5y) :(3x + 9y) = 5 : 7` , then ` x : y ` =

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If ` (7x+5y) :(3x + 9y) = 5 : 7` , then ` x : y ` =
A. `17 : 5`
B. ` 5 : 11`
C. ` 5 : 13`
D. `5 : 17`
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Correct Answer - D
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