Пошаговое объяснение:
1196
1)
(3х+4)/28=22/7
7(3х+4)=28×22
21х+28=616
21х=616-28
21х=588
Х=588:21
Х=28
2)
2 1/7:3/28=3 1/3х:1,5
15/7:3/28=10/3х:3/2
3/28×10/3х=15/7×3/2
5/14х=45/14
Х=45/14:5/14
Х=45/14×14/5
Х=9
3)
3/(2х-1)=7/(4х-1)
7(2х-1)=3(4х-1)
14х-7=12х-3
14х-12х= - 3+7
2х=4
Х=2
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Answers & Comments
Пошаговое объяснение:
1196
1)
(3х+4)/28=22/7
7(3х+4)=28×22
21х+28=616
21х=616-28
21х=588
Х=588:21
Х=28
2)
2 1/7:3/28=3 1/3х:1,5
15/7:3/28=10/3х:3/2
3/28×10/3х=15/7×3/2
5/14х=45/14
Х=45/14:5/14
Х=45/14×14/5
Х=9
3)
3/(2х-1)=7/(4х-1)
7(2х-1)=3(4х-1)
14х-7=12х-3
14х-12х= - 3+7
2х=4
Х=2