Find the value of : `(x/y)^x (y/x)^y` , x=4,y=-7

Find the value of x , y 2x+3y=6 3x-2y=4 .

Find the value of x and y : 2x+3y=5,3x+y=4

Find the values of x and y. If (i) (x,4)=(-7,y) (ii) (x-3,6)=(4,x+y)

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

Find the values of x and y if: (x-1,y+3)=(4,4)

Find the values o x and y if: (5x-3y,y-3x)=(4,-4)

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

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))

Find the value of 'x' and 'y' if : 2[(x,7),(9,y-5)]+[(6,-7),(4,5)]=[(10,7),(22,15)]

Find the greatest value of x^3y^4 if 2x + 3y = 7 and x>=0,y>=0 .