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ArmyLAnn
@ArmyLAnn
August 2022
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Решите систему уравнений:
a)
x+y=2
-3x-5y=7
б)
2x+y=-8
2x-3y=-4
Заранее спасибо :}
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Answers & Comments
Evgenia4836
Verified answer
A) x=2-y
-3(2-y)-5y=7
-6+3y-5y=7
-2y=13
y= -13/2
x= 2+13/2= 17/2
б) y=-8-2x
2x-3(-8-2x)=-4
2x+24+6x=-4
8x=-28
x= -7/2
y= -8+2*7/2= -1
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Answers & Comments
Verified answer
A) x=2-y-3(2-y)-5y=7
-6+3y-5y=7
-2y=13
y= -13/2
x= 2+13/2= 17/2
б) y=-8-2x
2x-3(-8-2x)=-4
2x+24+6x=-4
8x=-28
x= -7/2
y= -8+2*7/2= -1