At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions

this specifically

Well first you need to know how to read a matrix. Do you know how to read a matrix?

no....

im kind of clueless

and im bad at asking for help

|dw:1438709526900:dw|

aw, thank you

You're welcome! :)

itll help alot if i understand this

Alright I'll try the best I can in getting you to understand this. |dw:1438709667710:dw|

Did you get that so far?

uuhm..

oh, yeah okay i get it.

since one would be just x, sorry takes me awhile to work things out.

It's okay! Take your time! :)

Do you know what the other two equations will be if you used my method that I showed you?

5x+4y+7z=81?

Yes!

-4x+y-6z=-37

\[x+2y-2z=11\]\[5x+4y+7z=81\]\[-4x+y-6z=-37\]

Now do you know how to solve for x's and y's?

replace them with the numbers or..

Let's start with the first two equations.

sorry, ah :(

|dw:1438710552563:dw|

And it's okay. That was a rhetorical question.

Oh wait let me rewrite what I wrote on the side.

Tell me if you get that part.

hm..

i do, but at the same time i guess i need to know why we are doing that.

what is the reason for finding commons, is that like a big part of the equation?

what is the end result supposed to be? like, is the Y now 1? bleh...

why are we doing that?

Oh alright. so whenever im doing this i have to find a way to get rid of a variable?

Yes.

okay, so, like in this equation for example: |dw:1438711521979:dw|

just as an example

|dw:1438711724574:dw|

its an example problem of one i did and failed.

totally different problem sorry just trying to see where this applies to other problems too

thank you, youre a saint ;-;

okay, so lets finish this problem first

did you subtract?

im lost again

-3x-11z=-59 came from the drawing I drew earlier. Take a look at that and tell me if you get that.

where did the other two come from?

It came from the three equations we wrote from the matrix.

Oh lol okay.

https://join.me/592-430-542 im sharing my screen with you, is that alright??

Oh okay. I'm really sorry about that! Are you able to draw here?

We're almost done anyways.

|dw:1438713360885:dw|

alright, sorry i scared you haha

the brushes on here kind of suck there for i kind of suck

It's okay you didn't know! :) And at least you draw better than me XD

i changed the background so its less menacing lol

but anyways, MATH.

Lol okay. Now let's use the 1st and 3rd equations so we can get rid of y again.

alright

|dw:1438713734611:dw|

|dw:1438713838855:dw|

|dw:1438713940961:dw|

Did you get that?

noooooooooooooooooo

What part did you get lost on?

why did we multiply that row by 2 though?

multiply it by two but...

what happened to the row in the middle

Did you get that?

so...that whole row was canceled out?

i dont get iiiit

Which part?

im a kinesthetic learner, i figure things out differently im sorry this must be frustrating.

everything

|dw:1438715563780:dw|

And it's okay.

Did you understand this picture?

no

Do you know where I got the 1st and 3rd equations from?

lets solve this whole thing and then break it down because i dont know where we are headed

no

Oh okay then hold on.

its really cool of you to help me

thank you

oooooh

You understand it now?

yes

Okay great! I should have just showed you the steps earlier like that lol. XD

yeah omg

oh wow

Tell me if you understand that. This is the final step and it gives the answer.

that is a process

omg i actually understand

Yay that's great! :D

see, im taking a summer course and its online, the section imtaking is all about that so im stuck

Oh okay. Well hopefully this was helpful in figuring out how to solve it. :)

it was very helpful!

Lol I'm glad!

i might need help going through another problem because i know there are exceptions

|dw:1438718495088:dw|

oh sure

Okay thanks!

so do i get rid of the x?

because 4 can go into the 8 or no

|dw:1438718635151:dw|

|dw:1438718776581:dw|

|dw:1438718875081:dw|

|dw:1438718996313:dw|

|dw:1438719010410:dw|

Let's use these 2 equations. These are the 2nd and 3rd equations.

Oh wait.

oh nevermind if you wanna use those lets use those

No wait you were fine!

i was?

Yes!!! You got that step right! And yes you have to subtract in order to get rid of the x's.

It doesn't matter which 2 equations you start off with btw.

|dw:1438719205198:dw|

did i do that right?.....

like the second and the third

Ya you can use that. But make sure to cancel out the x again.

|dw:1438719564132:dw|

Make sure to put your variables in there so you won't make any mistakes.

|dw:1438719659795:dw|