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If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)=...

If `x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)=`
(a) `7/(11)`
(b) `(17)/(11)`
(c) `(17)/(23)`
(d) `4/5`

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