1.

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

Answer»

x/y=3/4 

(4x+5y)/(5x+2y) = (4( x/y)+5)/(5 (x/y)-2) = (4(3/4)+5)/(5(3/4)-2) 

=(3+5)/(7/4) 

= 32/7



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