Ответ:
Объяснение:
(9/x-1/y)/(9/x+1/y)= (9y-x)/xy/(9y+x)/xy= (9y-x)/(9y+x)
y/x=1/10
x= 10y
(9y-10y)/(9y+10y)= -y/19y= -1/19
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Ответ:
Объяснение:
(9/x-1/y)/(9/x+1/y)= (9y-x)/xy/(9y+x)/xy= (9y-x)/(9y+x)
y/x=1/10
x= 10y
(9y-10y)/(9y+10y)= -y/19y= -1/19