45. A peasant bought a cow, a goat, a sheep, and a pig, paying 1325 rubles. The goat, pig, and sheep together cost 425 rubles. The cow, pig, and sheep together cost 1225 rubles, and the goat and pig together cost 275 rubles. Find the price of each animal.
45.All the animals together cost 1325 rubles, and all except the cow cost 425 rubles, so the cow costs: $1325-425=900$ rubles. The goat, pig, and sheep cost 425 rubles, and the same without the sheep cost 275 rubles, so the sheep costs $425-275=150$ rubles. All, except the goat, cost 1225 rubles, so the goat costs: $1325-1225=100$ rubles, and the pig with the goat costs 275 rubles, then the pig alone costs: $275-100=175$ rubles.