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The equation (1/x) + (1/y) = 15, and (1/...

The equation `(1/x) + (1/y) = 15`, and `(1/x) – (1/y)= 5` are such that ax = 1 and by = 1. The values of a and b respectively are _

A

10, 5

B

5, 10

C

10, -5

D

`-5, 10`

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