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николь011
@николь011
October 2021
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помогите номер 2!!!!!!!!!!
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Aquarius44
8(2-х)=-72
16-8х=-72
16+72=8х
88=8х
х=88/8
х=11
(7х+1)-(6х+3)=5
7х+1-6х-3=5
х-2=5
х=5+2
х=7
х-2/6+х-1/15=3
5(х-2)/30+2(х-1)/30=3
5х-10+2х-2/30=3
умножим обе части на 30
5х-10+2х-2=90
7х-12=90
7х=90+12
7х=102
х=102/7
х=14целых 4/7
1 votes
Thanks 1
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Answers & Comments
16-8х=-72
16+72=8х
88=8х
х=88/8
х=11
(7х+1)-(6х+3)=5
7х+1-6х-3=5
х-2=5
х=5+2
х=7
х-2/6+х-1/15=3
5(х-2)/30+2(х-1)/30=3
5х-10+2х-2/30=3
умножим обе части на 30
5х-10+2х-2=90
7х-12=90
7х=90+12
7х=102
х=102/7
х=14целых 4/7