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What is the solution to the following system?

3x+2y+z=20
x-4y-z=-10
2x+y+2z=15

A. (2, 3, 4)
B. (4, 3, –2)
C. (4, 3, 2)
D. (6, 7, –2)

Respuesta :

ghanami
hello : 
3x+2y+z=20...(1)
x-4y-z=-10...(2)
2x+y+2z=15...(3)
answer : C 
you can subsct x= 4    y =3     z=2  in (1)  ,  (2)  , (3) equations
rkimestry
I think it's A, (2, 3, 4)

If not A, it might be C.

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