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irinda232
@irinda232
July 2022
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Решите систему:
x+z+y=9
x+y-z=7
x-y=2
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acar
Verified answer
X=2+y(3)
(2)
2+y+y-z=7
2y+2-z=7
z=2y-5
подставим в 1
2+y+2y-5+y=9
4y-3=9
4y=12
y=3
x=2+y=2+3=5
z=3*2-5=6-5=1
ответ :y=3,x=5,z=1
1 votes
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Answers & Comments
Verified answer
X=2+y(3)(2)
2+y+y-z=7
2y+2-z=7
z=2y-5
подставим в 1
2+y+2y-5+y=9
4y-3=9
4y=12
y=3
x=2+y=2+3=5
z=3*2-5=6-5=1
ответ :y=3,x=5,z=1