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If x : y = 3 :4 then (7x + 3y) : (7x - 3...

If `x : y = 3 :4` then `(7x + 3y) : (7x - 3y)` = ?

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If x:y=3:7, then find (7x+3y):(9x-3y)

7x - 2y = 3 , 22x - 3y = 16 .

If x:y= 3: 4, then the value of (5x - 2y)/(7x + 2y) =

If 3y + 3 = 7x , then 21y - 49 x =

7x + 3y = 4221x + 9y = 42

{:(3x + 2y = 4),(2x - 3y = 7):}

{:(3x + 2y = 4),(2x - 3y = 7):}

Simplify: (2x + 5y)(3x + 4y) - (7x + 3y)(2x + y)