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chernikova2006
@chernikova2006
June 2022
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Помогите решить уравнения: 5(х-1)=4(х-2)=10
7(х-9)-(3+1)=9
2(х+2)-3(х-2)=5-4(3х-1)
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Simka1012
Первое уравнение:
5*(х-1)=4*(х-2)
5х-5*1=4х-4*2
5х-5=4х-8
5х-4х=-8+5
1х=-3
х=-3
второе ур:
7(х-9)-(3+1)=9
7х-63-4=9
7х-67=9
7х=9+67
7х=76
х=76/7
проверка
7(76/7-9/1)-(3+1)=9
7/1*76/7-7/1*9/1-4=9
76/1-63/1-4=9
13/1-4/1=9
9=9
третье:
2х+2*2-3х+3*2=5-4(3х-1)
2х+2*2-3х+3*2=5-4*3х+4*1
10-х=5-4*3х+4*1
-х=-1-12х
11х=-1
х=-1/11
1 votes
Thanks 1
chernikova2006
Спасибо огромное!
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Answers & Comments
5*(х-1)=4*(х-2)
5х-5*1=4х-4*2
5х-5=4х-8
5х-4х=-8+5
1х=-3
х=-3
второе ур:
7(х-9)-(3+1)=9
7х-63-4=9
7х-67=9
7х=9+67
7х=76
х=76/7
проверка
7(76/7-9/1)-(3+1)=9
7/1*76/7-7/1*9/1-4=9
76/1-63/1-4=9
13/1-4/1=9
9=9
третье:
2х+2*2-3х+3*2=5-4(3х-1)
2х+2*2-3х+3*2=5-4*3х+4*1
10-х=5-4*3х+4*1
-х=-1-12х
11х=-1
х=-1/11