Question

If r+s/r =3 and t+r/t =5, what is the value of s/t ?

Answer 1

r+s/r=3

3r=r+s

s=2r

t+r/t=5

5t=t+r

4t=r

t=1/4r

s/t=2r÷1/4r

s/t=8