25 Years in a Silver Anniversary.
Well you can find what it equals in terms of x. If you know that y plus y equals 25 to the power of 25 then you know that 2y=25^25 which means that y=(25^25)/2 - this is a huge number. To find x+y you just add x to what y equals so you get x+(25^25)/2
y=(320 x 25 )/ 40 = 200.
y= -25
An equation where y = 81
x/y = 5/(y^2) and y/x = 5/(x^2). So x/y + y/x = 5/(y^2) + 5/(x^2), which equals 5x^2/(x^2 y^2) + 5y^2/(x^2 y^2) equals 5(x^2 + y^2)/25 equals (x^2 + y^2)/5. x^2 = 25/y^2, so you get (25/y^2 + y^4/y^2)/5 equals ((25 + y^4)/y^2)/25, which shows that your math teacher is on crack. Seriously, I'm not sure that's true.
y = -5
3y+5=y-25 2y=-30 y= -15
y = x/k so k = 1/25; when x = 1, x/k, hence y, = 25
25
I x=5 and y=2, then (5x5)=25 plus (9x2)=18. 25+18=43
4y20 = 500 => y20 = 25 => y = 20√25 = 1.1746 approx Then x = 500 - y = 489.8254 (approx).
... You have to know what x and y are first.