Question

If p+r = 2q and (1/q)+(1/s)=(2/r), then p:q is ?

Answer 1

divide first eq. by q
p/q + r/q = 2

multiply 2nnd eq. by r
r/q + r/s =2
r/q = 2-r/s
combine
p/q + (2-r/s) = 2
p/q = r/s

Answer 2

Thanks henkjan :D