If `x :\ y=8:9,` find the ratio `(7x-4y):3x+2ydot`

If x :\ y=3:5 , find the ratio 3x+4y :8x+5y .

If x:y=3:5, find the ratio 3x+4y:8x+5y

If (x+y):(x-y)=7:3, then find the ratio (x^(3)+y^(3)):(x^(3)-y^(3))

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

If 4x^2+y^2=40\ a n d\ x y=6,\ find the value of 2x+ydot

If 4x^2+y^2=40 and x y=6, find the value of 2x+ydot

If the ratio between 8 and 11 is the same as the ratio of 2x - y to x + 2y , find the value of (7x)/(9y) .

If 7x - 15y = 4x + y , find the value of x: y . Hence, use componendo and dividendo to find the values of : (i) (9x + 5y)/(9x - 5y) (iI) (3x^(2) + 2y^(2))/(3x^(2) - 2y^(2))

(a) If x : y = 3 : 4 , then find the value of the ratio (2x + y) : ( 9x - 2y) . (b) If x : y = 5 : 4 , then find the value of the ratio (x^(2) + xy) : (x^(2) - xy) .

If 2x+3y=8 and x y=2 , find the value of 4x^2+9y^2