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макака146
@макака146
July 2022
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решите плиз
а)2 (2+y)=19-3y.
а)3x=15.
б)4x-2=2x+6.
б)-3 (3b+1)-12=12.
в)11+5x=55+3x.
в)-2 (2-5x)=2(x-3)-5.
г)-8x-17=3x-105.
г)-4,92y-(0,8y+5,12)=-0,88-y.
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GovherSalmanova
А) 2(2+y)=19-3y
4+2y=19-3y
2y+3y=19-4
5y=15
y=3
а) 3х=15
х=5
б) 4x-2=2x+6
4x-2x=6+2
2x=8
x=4
б) -3(3b+1)-12=12
-9b-3-12=12
-9b-15=12
-9b=12+15
-9b= 27
b=-3
в) 11+5х=55+3х
5х-3х=55-11
2х=44
х=22
в) -2(2-5х)=2(х-3)-5
-4+10х=2х-6-5
10х-2х=-6-5+4
8х= -7
х=-7/8
г) -8х-17=3х-105
-8х-3х=-105+17
-11х=-88
х=8
г) -4,92у-(0,8y+5,12)=-0,88-y
-4,92y-0,8y-5,12=-0,88-y
-5,72y-5,12=-0,88-y
-5,72y+y=-0,88+5,12
-4,72=4,24
y=-53/59
2 votes
Thanks 12
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Report "решите плиз а)2 (2+y)=19-3y.а)3x=15.б)4x-2=2x+6.б)-3 (3b+1)-12=12.в)11+5x=55+3x...."
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Answers & Comments
4+2y=19-3y
2y+3y=19-4
5y=15
y=3
а) 3х=15
х=5
б) 4x-2=2x+6
4x-2x=6+2
2x=8
x=4
б) -3(3b+1)-12=12
-9b-3-12=12
-9b-15=12
-9b=12+15
-9b= 27
b=-3
в) 11+5х=55+3х
5х-3х=55-11
2х=44
х=22
в) -2(2-5х)=2(х-3)-5
-4+10х=2х-6-5
10х-2х=-6-5+4
8х= -7
х=-7/8
г) -8х-17=3х-105
-8х-3х=-105+17
-11х=-88
х=8
г) -4,92у-(0,8y+5,12)=-0,88-y
-4,92y-0,8y-5,12=-0,88-y
-5,72y-5,12=-0,88-y
-5,72y+y=-0,88+5,12
-4,72=4,24
y=-53/59