Question

2x – 3y + z = –1
2x – 2y – 2z = –8
x + 5y – 3z = 2
A.(–1, 2, 8)
B. (1, 5, –3)
C.(1, 1, 0)
D.(1, 2, 3)

Answer 1

2x-3y+z=-1
2x-2y-2z=-8
-------------
0 -y+3z=7 so than y=3z-7

2x-2y-2z=-8
x+5y-3z=2 multiply by -2 and assume

2x-2y-2z=-8
-2x-10y+6z=-4
----------------
0 -12y+4z=-12 than -12(3z-7)+4z=-12
-36z+84+4z=-12
-32z=-96
z=-96/(-32) = 3
z=3 so than y=3*3-7=9-7=2
y=2

2x-2y-2z=-8
2x-2*2-2*3=-8
2x=-8+4+6
2x=2
x=1

(1,2,3) will be right sure

Answer 2

D.

Answer 3

hope that is understandably su

Answer 4

sure

Answer 5

give me medal please thank you

Answer 6

good luck bye