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If (a)/(4)=(b)/(5) then (a) (a+4)/(a-4...

If `(a)/(4)=(b)/(5)` then
(a) `(a+4)/(a-4)=(b-5)/(b+5)`,
(b) `(a+4)/(a-4)=(b+5)/(b-5)`
(c) `(a-4)/(a+4)=(b+5)/(b-5)`
(d) none of these

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