24960:(300*(200-6х):115))=8
300(200-6х):115=8*24960
200-6х=(199680*115):300
200-6х=76544
-6х=76344
х=-12724
Проверка: 24960:(300*(200-6*(-12724)):115))=8
8=8
Xy/(x-y)(1/x+1/y)-(x+y)/(x-y)=
1. 1/x+1/y=(x+y)/(xy)
2. xy/(x-y)*(x+y)/(xy)=(x+y)/(x-y)
3. (x+y)/(x-y)-(x+y)/(x-y)=0
Ответ: 0
28/35=4/5;75/125=15/25=3/5;16/18=8/9;10/14=5/7;98/96=49/48.
На7,на5,на2,на2,на2. Это правильно :)
11,13,22,24,31,33,42,44-8 чисел