If `x=3\ a n d\ y=-1,` find the values of each of the using identity: `(5/x+5x)((25)/(x^2)-25+25 x^2)`

If x=3 and y=-1, find the values of each of the using identity: ((5)/(x)+5x)((25)/(x^(2))-25+25x^(2))

If x=3\ a n d\ y=-1, find the values of each of the using identity: (3/x-x/3)((x^2)/9+9/(x^2)+1)

If x=3\ a n d\ y=-1, find the values of each of the using identity: (x/7+y/3)((x^2)/(49)+(y^2)/9-(x y)/(21))

If x=3\ a n d\ y=-1, find the values of each of the using identity: (x/4-y/3)\ ((x^2)/(16)+(x y)/(12)+(y^2)/9)

If x=3\ a n d\ y=-1, find the values of each of the using identity: (9y^2-4x^2)(81 y^4+36 x^2y^2+16 x^4)

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

Find the value of x , 3/5 = x/-25

If 5 ^(2x +1) div 25 = 125, find the value of x .

If 5^(3x-1)-:25=125 , find the value of x.

If 4x-5y=37 and 3x-4y=25, then find the value of x-y.