Предмет: Математика, автор: сара43

Решить систему уравнений :

lnx-lny =ln3

X-2y=5

Ответы

Автор ответа: tseluyko58

6

ln(x/y)=ln3 x>0, y>0

x=2y+5
x/y=3
x=2y+5
(2y+5)/y=3
(2y-3y+5)/y=0
-y=-5
y=5
x=2*5+5=15
Ответ: (15;5)

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