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If `(5x - 3y) : (2x + 4y) = 11 : 12`, then find ` x : y`.

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If `(5x - 3y) : (2x + 4y) = 11 : 12`, then find ` x : y`.
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Given that, ` (5x- 3y) : (2x + 4y) = 11 : 12`
or, `(5x - 3y)/(2x + 4y) = 11/12`
or, ` 60x - 36y = 22x + 44y`
or, ` 60x - 22x = 44y + 36y`
or, ` 38x = 80y`
or, ` x/y = 80/38 " or, " x/y = 40/19`
` :. X : y = 40 : 19`.
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