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elizaveta2808
@elizaveta2808
November 2021
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Определите , при каком значении х равны значения выражений 1,1-х/8 и 0,8- х/9.
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irinaorlova2
1.1-х\8=0.8-х\9
1.1*72-9х-0.8*72+8х=0
79,2-57,6-х=0
-х=-21,6
х=21,6
5 votes
Thanks 7
znaniya2013
1 1/10 - Х/8=0,8 -Х/9
(88 - 10Х)/80=8/10-Х/9
(88-10Х)/80=(72-10Х)/90
(88-10Х)*90=80*(72-10Х)
88*90-900Х=80*72-800Х
-900Х+800=5760-7920
- 100Х= - 2160
Х=21,6
2 votes
Thanks 2
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Answers & Comments
1.1*72-9х-0.8*72+8х=0
79,2-57,6-х=0
-х=-21,6
х=21,6
(88 - 10Х)/80=8/10-Х/9
(88-10Х)/80=(72-10Х)/90
(88-10Х)*90=80*(72-10Х)
88*90-900Х=80*72-800Х
-900Х+800=5760-7920
- 100Х= - 2160
Х=21,6