x+y =9, x-y=5, find the value of x and y.

If 2^(x) = 4 xx 2^(y) and 9 xx 3^(x) = 3^(-y) , find the values of x and y.

If (x+y, 5) = (10, y-3), find the values of x and y.

If (x+y, x-y) = (3, 1), find the values of x and y.

If 2x + y = 23 and 4x - y = 19, find the values of x - 3y and 5y - 2x.

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))

3x-y=3 , find the value of x and y 9x-3y=9

If 9x^2+25 y^2=181\ \ a n d\ x y\ =\ -6, find the value of 3x+5y

If 3x+5y=11\ a n d\ x y=2, find the value of 9x^2+25 y^2

If x : y = 4 : 7 , find the value of (3x + 2y) : (5x + y) .

If 2x + y = 23 and 4x - y = 19 , then find the values of 5y - 2x and (y)/(x) - 2 .