г) (p - q)/p * ((p/(p - q)) + (p/q))

((p - q)/p) * ((p/(p - q)) + (p/q)) = (p - q)/p * ((pq + p(p - q))/((p - q)q)) = (pq + p^2 - pq)/(pq) = (p^2)/(pq) = p/q