If ` (7x+5y) :(3x + 9y) = 5 : 7` , then ` x : y ` =

(3x + 5y) (5x - 7y) = ____

If (7x-5y):(3x+4y) = 7:11 then show that (3x-2y): (3x+4y) = 137 : 473

If 3x + 5y = 9 and 5x + 3y = 7 , then what is the value of x + y ?

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))

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

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

Two consecutive sides of a parallelogram are 4x+5y=0a d n7x+2y=0. If the equation of one diagonal is 11 x+7y=9, Equation of other diagonal : (A) 11x + 7y =0 (B) 3x - 5y + 5 = 0 (C) 7x + 11y = 0 (D) 3x + 5y + 5 =0