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knarik5555
@knarik5555
July 2022
1
8
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Решить системы уровнений
3x-5y=-1
x+y=5
5a-2b=0.1
-5a-4b=0.5
3x-2y=5
x+4y=10
x-2y=5
3x+4y=10
x-y=4
x*y=12
Срочнооо р жж
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bessssonovaa
3x-5y=-1
x+y=5
x=5-y
3(5-y)-5y=-1
15-3y-5y=-1
15-8y=-1
-8y=-1-15
-8y=-16
y=2
x=5-y
x=5-2
x=3
5a-2b=0.1
-5a-4b=0.5
-6b=0,6
b=-0,1
5a-2b=0,1
b=-0,1
5a-2(-0,1)=0,1
5a+0,2=0,1
5a=-0,1
a=0,02
(-0,02 ; -0,1)
3x-2y=5
x+4y=10
x=10-4y
3(10-4y)-2y=5
30-12y-2y=5
-14y=-25
y=1
x=10-4y
x=10-4*1
x=6
(1
; 6
)
x-2y=5
3x+4y=10
x=2y+5
3x+4y=10
3(2y+5)+4y=10
6y+15+4y=10
10y=-5
y=-0,5
x=2y+5
x=2(-0,5)+5
x=-1+5
x=4
(4; -0,5)
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Answers & Comments
x+y=5
x=5-y
3(5-y)-5y=-1
15-3y-5y=-1
15-8y=-1
-8y=-1-15
-8y=-16
y=2
x=5-y
x=5-2
x=3
5a-2b=0.1
-5a-4b=0.5
-6b=0,6
b=-0,1
5a-2b=0,1
b=-0,1
5a-2(-0,1)=0,1
5a+0,2=0,1
5a=-0,1
a=0,02
(-0,02 ; -0,1)
3x-2y=5
x+4y=10
x=10-4y
3(10-4y)-2y=5
30-12y-2y=5
-14y=-25
y=1
x=10-4y
x=10-4*1
x=6
(1
x-2y=5
3x+4y=10
x=2y+5
3x+4y=10
3(2y+5)+4y=10
6y+15+4y=10
10y=-5
y=-0,5
x=2y+5
x=2(-0,5)+5
x=-1+5
x=4
(4; -0,5)