complete the ordered triple
3x+3y+z=1
x-3y+2z=19
8x-2y+3z=34
someone please help

- anonymous

complete the ordered triple
3x+3y+z=1
x-3y+2z=19
8x-2y+3z=34
someone please help

- chestercat

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- amistre64

whats this?

- amistre64

you should be a pro by now ;)

- anonymous

there u r, thought so cant figure out what i did wrong

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## More answers

- amistre64

let me do this up in notepad and show you a better view of it....matrix style :)

- anonymous

please

- anonymous

r u still there doesnt usually take you this long

- amistre64

z =-1324/23 is one of them, if I did it right :)

- amistre64

does that sound right to you :)

- anonymous

i have no idea i didnt do the fractions

- amistre64

y = -5931/207

- amistre64

its messy, but lets see if it works in the end :)

- anonymous

i got
x,y,z
2,-3,1

- amistre64

x = 3324/69

- amistre64

does it work what you got?

- anonymous

and of course mathlab says its wrong

- anonymous

dont know i hate fractions so i eliminate them

- amistre64

:) i dont think you can get around it this time

- anonymous

what happen to the superhero genious

- anonymous

can we start from the begining and work the problem

- amistre64

were gonna half to , i messed it up somewhere ;)

- anonymous

ok ready when u r

- amistre64

I got this so far :) and it looks about like what I had the last time...

##### 1 Attachment

- anonymous

its confusing its not at all what i got i was doing it the way we were earlier

- amistre64

z = 4 :)

- amistre64

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- anonymous

-6x-6y-2z=-2
x-3y+2z=19
add them and u get
-5x-9y=17

- amistre64

yeah, then it gets messy :)

- amistre64

y=-3, z=4

##### 1 Attachment

- amistre64

x=2 :)
lets double check it ;)

##### 1 Attachment

- amistre64

it just formats better in notepad, and I dont get as lost :)

- anonymous

-9x-9y-3z=-3
8x-2y+3z=34
add them and you get
-x-11y=31

- anonymous

-5x-9y=17
5x+55y=-155
add them together and get
46y=-138
y=-3

- amistre64

3(2)+3(-3)+(4)=1
6 -9 +4 = 1
10-9=1...true
(2)-3(-3)+2(4)=19
2 +9 +8=19
10+9=19.......true
8(2)-2(-3)+3(4)=34
16 +6+12=34
16 +18=34 .......true
(x,y,z)
(2 ,-3, 4)

- anonymous

-x-11y=31
-x-11(-3)=31
-x-33=31
-x=-2
x=2

- amistre64

you got it :) I did the substitution method....I dont get as many errors that way

- amistre64

common "Z" ;)

- amistre64

that didnt work as well as it did in my head :)

- amistre64

you got 2 out of 3.... work the z.. work the z

- anonymous

3x+3y+2=1
3(2)+3(-3)+z=1
6x+-9y+z=1
-3+z=1
z=4

- amistre64

yay!!

- anonymous

my math was off thats how i got z=-1

- amistre64

lol..... my math was waaaayyyyyy off to begin with on this one :) BAD FINGERS!!!!

- anonymous

i forgot how to add i guess

- amistre64

hey, the cavemen lived without it... and we evolved ;)

- anonymous

yeah i think people made up this stuff and had to make it confussing so no one could tell them it was wrong

- anonymous

so when the variables change to a, b, c its the same just different letters

- amistre64

yep.

- amistre64

it dont matter what you name them, they are all just different variables in the end

- anonymous

ok so
6a+3b+c=-20
a-3b+2c=-12
17a-2b+3c=-88

- amistre64

work it out like you did the other one, and let see your moves lol

- anonymous

-12a-6b-2c=40
a-3b+2c=-12
add them together get
-11a-9b=28

- amistre64

good so far...

- anonymous

-18a-9b-3c=60
17a-2b+3c=-88
add them get
-a-11b=-28

- amistre64

-28?

- amistre64

yeah.......

- amistre64

-11a-9b=28
-a-11b=-28

- anonymous

-11a-9b=28
11a+121=308
add them get
112b=336
112(3)=336
b=3

- amistre64

b = 3, I agree

- anonymous

-a-11b=-28
-a-11(3)=-28
-a-33b=-28
-a=-61
a=61

- anonymous

is a right?

- amistre64

-a -33 = -28
-a = -28+33
-a = 5
a = -5

- anonymous

i got that the first time thought -61 was too high

- anonymous

6a+3b+c=-20
6(5)+3(3)+c=-20
30+9+c=-20
c=-59

- amistre64

c looks good :)

- amistre64

double check your answers by plugging these values in your eqautions and see if they work

- anonymous

mathlab says no

- amistre64

not mathlab, the original equations :)

- anonymous

i put my answers into mathlab it said they were wrong

- amistre64

do you have the correct equations? no typos?

- anonymous

a,b,c
5,3,-59

- anonymous

c has got to b wrong

- amistre64

6(5)+3(3)+(-59)=-20
30 +9 -59 = -20
39 - 59 = -20
-20 = -20
(5)-3(3)+2(-59)=-12
5 -9 -118 .....yeah :)
17a-2b+3c=-88

- anonymous

equation 1 is the only won that ckecked out right

- amistre64

-12a -6b -2c =40
a -3b +2c =-12
------------------
-11a -9b = 28

- anonymous

thats what i got so where did i go wrong

- amistre64

(6a+3b+c=-20)-3
-18a -9b -3c = 60
17a -2b +3c =-88
------------------
-a -11b =-28 ....good

- amistre64

(-a -11b =-28 )-11
11a +121b = 308
-11a - 9b = 28
------------------
112b = 336
b = 3

- amistre64

-11a - 9(3) = 28
-11a = 28+27
-11a = 55
a = -5

- amistre64

-5 -3(3) +c =-12
-5-9 +c = -12
-14 + c = -12
c = -12+14
c = 2

- anonymous

ok hold on thats way different then what i got

- amistre64

6a+3b+c =-20
a-3b+2c =-12
17(-5)-2(-3)+3(2) =-88
-85 +6 +6 that aint working either....

- amistre64

ow my brain hurts.....

- anonymous

dont quit on me now

- amistre64

do substitution......less error :)

- amistre64

doing it on paper :)

- amistre64

doing it on paper :)

- anonymous

a=-5

- amistre64

(a,b,c)
(-5,3,1)

- anonymous

yeah thats what i just got

- anonymous

forgot to multiply by -1 to get a

- amistre64

and I had it, but missed that "2"c....which threw me lol

- anonymous

i still got 8 more and another page to do gonna b a long night for me

- amistre64

:) post another question on the left if you need to, this ones a bit long :)

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