Question

|{ -x+y+2z=7
<|{ 2x-3y-2z=-4
|{ x -z=-2

possible answers are
(3,3,5)
(3,0,5)
(-3,0,5)
(3,0,-5)

Answer 1

the last one is the answer????

Answer 2

or the one before the last

Answer 3

ok lets see.

Answer 4

last one doesn't work for lat equation. because 3-(-5) = 3+5 = 8

Answer 5

third one doesn't work for last equation because -3-5=-8

Answer 6

must be one of the first two. lets find it

Answer 7

-3+3+10=7
<|{ 6-9-10=-4
|{ 3 -5=-2

Answer 8

thats not it

Answer 9

nope it is not first one

Answer 10

-3+0+10=7
6-0-10=-4
3 5=-2

Answer 11

must be (3,0,5)

Answer 12

thats not it

Answer 13

yes, late equation is x - z = -2 so 3-5=-2 is correct

Answer 14

-3+0+10=7
6-0-10=-4
-3 5=-2

Answer 15

-3+7=10
6-10=-4
3-5=-2

Answer 16

the first one hast to be 7

Answer 17

last equation is x - z = -2 you wrote -x+z

Answer 18

no -5 cancelled out

Answer 19

yes it is if you use x=3,y=0,z=5

Answer 20

-3+0+2*5=-3+10=7

Answer 21

yes?

Answer 22

second equation is 2x-3y-2z = -4 we get
2*3-0-2*5=6-10=-4

Answer 23

and third is x-z=-2 we get
3-5=-2

Answer 24

so they all work for (3,0,5)

Answer 25

your right i am going to choose yours

Answer 26

good because it is true!