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table123

Ответ:

Пошаговое объяснение:

1) поделим  1-е ур-е на 2-е, 3^(x-y)*5^(y-x)=5/3,   5^(y-x) /3^(y-x)=5/3,    ,  (5/3)^(y-x)=5/3,  y-x=1<  y=1+x, подставим в 1-е ур-е,   3^x*5^(1+x)=75,

3^x*5*5^x=75,  15^x= 15,  x=1,  y=1+1=2

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