Решите систему уравнений с 4-мя неизвестными:
(5/6)Sk+(1/6)Sa=670;
(5/6)Sk^2+(1/6)Sa^2=749;
(5/6)Sa+(1/6)Sk=710;
(5/6)Sa^2+(1/6)Sk^2=X.
Найдите Х.
(5/6)Sk+(1/6)Sa=670;
(5/6)Sk^2+(1/6)Sa^2=749;
(5/6)Sa+(1/6)Sk=710;
(5/6)Sa^2+(1/6)Sk^2=X.
Найдите Х.
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