Предмет: Алгебра, автор: 15п465п465

Очень нужно! Решите систему уравнений х+у=0 и 3 ^( х+5 у)=81

15п465п465: 3 в степени х+5у=81

15п465п465: спасибо ,затормозил

Ответы

Автор ответа: 10257

1

х=-y
3^(-y+5y)=81
3^4y=3^4
4y=4
y=1
x=-1

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