решите пропорцией:
35:x=8:24
(x-2):5=2 1/2 : 1/2
11:20=2 1/5 : (2x)
20 баллов!
35:x=8:24
(x-2):5=2 1/2 : 1/2
11:20=2 1/5 : (2x)
20 баллов!
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Answers & Comments
8х=35•24
8х=840
х=840:8
х=105
(х-2):5=2 1/2:1/2
(х-2)•1/2=5•2 1/2
1/2х-1=12,5
1/2х=12,5+1
1/2х=13,5
х=13,5:1/2
х=27
11:20=2 1/5:(2х)
11•2х=20•2 1/5
22х=44
х=44:22
х=2