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Narutoshinobi
@Narutoshinobi
July 2022
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Решите систему уравнений:
2x+y−z=6
3x−y+2z=5
4x+2y−5z=9
Назовите значение суммы: x+y+z
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DariosI
Verified answer
Z=2x+y-6
3x-y+2(2x+y-6)=5
4x+2y-5(2x+y-6)=9
z=2x+y-6
3x-y+4x+2y=5+12
4x+2y-10x-5y=9-30
z=2x+y-6
7x+y=17
-6x-3y=-21
z=2x+y-6
y=17-7x
6x+3(17-7x)=21
6x-21x+51=21
15x=30
x=2
y=17-7*2=3
z=2*2+3-6=1
x+y+z=2+3+1=6
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Answers & Comments
Verified answer
Z=2x+y-63x-y+2(2x+y-6)=5
4x+2y-5(2x+y-6)=9
z=2x+y-6
3x-y+4x+2y=5+12
4x+2y-10x-5y=9-30
z=2x+y-6
7x+y=17
-6x-3y=-21
z=2x+y-6
y=17-7x
6x+3(17-7x)=21
6x-21x+51=21
15x=30
x=2
y=17-7*2=3
z=2*2+3-6=1
x+y+z=2+3+1=6