If we are given x such that 25^x-9^y=18 and 5^x-3^y=3, compute 5^x+3^y.

25 = 5*5 and 9 = 3*3, which we can exploit to write

so that this expression is actually a difference of squares. We can factorize this to get

and given that , we divide both sides by this to get

is there answer choices?

the answer is 0.3175 hope that you ^w^

also you might actually want to put this picture up if you want people to solve it luckily i remember this question