1)
2/6=1/3
3/9=1/3
4/12=1/3
5/25=1/5
6/48=1/8
10/90=1/9
2)
6/14=3/7
10/22=5/11
12/14=6/7
14/16=7/8
18/28=9/14
20/26=10/13
1)<span>29x+67x=30720
96х=30720
х=30720/96
х=320
2)</span><span>25x+9x=1394.
34х=1394
х=1394/34
х=41</span>
5+х=3х-3(4х+5)
5+х=3х-12-15
Х-3х=-5-12-15
-2х=-32
Х=-32/-2
Х=16
24ч= 24*60 = 1440 мин
30с= 30*24*60 = (720)*60 = 43200 мин
1г = 365*24*60 = (8760)*60 = 525600 мин