Question

Please help! Elimination to solve?

Answer 1

I need to know how to do it or a calculator to help me. I have several questions like this.

Answer 2

I could write you a program to do it.
What kind of calculator do you have?

Answer 3

I don't have one..

Answer 4

@blurbendy Let's code something for her.

Answer 5

@lissa_bug What kind of computer?

Answer 6

Just a Gateway laptop.

Answer 7

hm, this would be an interesting project.

Answer 8

How long would it take?

Answer 9

Well, we will write you a program that you'll run on your computer to help you solve it.
Remember we are doing it for free, so be patient.

Answer 10

No, I am appreciative, it's just that I am on a really tight schedule.

Answer 11

We all are. I want to sleep too.
@hero @mebs @ganeshie8
Where my coders at?

Answer 12

No, I mean I literally have only about an hour...

Answer 13

How many questions?

Answer 14

Most likely 10 or under. I can't see yet.

Answer 15

@hero .NET?

Answer 16

System.out.println("ha, ha.");

Answer 17

Is that like fortran or something?

Answer 18

niet

Answer 19

Amusing

Answer 20

@Hero Why?

Answer 21

What are you trying to do here?

Answer 22

I wanted us to write a program for her to help solve the equations.
Since I'm sleepy; wanted others to help; they might be faster.

Answer 23

just do the problem...
x + y + 2z = 3
x - y - z = 0
-------------
2x + z = 3

x - y - z = 0 -->(-2)
3x - 2y - z = 1
-------------
-2x + 2y + 2z = 0 (result of multiplying by -2)
3x - 2y - z = 1
-------------
x + z = 1

2x + z = 3
x + z = 1 -->(-1)
-----------
2x + z = 3
-x -z = -1
-----------
x = 2

now sub 2 in for x
2x +z = 3
2(2) + z = 3
4 + z = 3
z = 3 - 4
z = -1

now sub 2 in for x and -1 in for z in one of the original equations
x + y + 2z = 3
2 + y + 2(-1) = 3
2 + y - 2 = 3
y = 3

check by subbing in known values in one of the original equations
x - y - z = 0
2- 3 -(-1) = 0
2 - 3 + 1 = 0
-1 + 1 = 0
0 = 0 (correct)

x = 2, y = 3, and z = -1 or (2,3,-1)

Answer 24

@texaschic101 Cool, but I already gave her a way to do it.
Thank you for helping.

Answer 25

lol......I always was a day late and a dollar short

Answer 26

I don't get exactly what you mean, but sure, I'll give you a dollar.

Answer 27

its just a saying....don't worry about it....but by giving her a program, is she really learning how to do it ?

Answer 28

although I can't really talk because I just gave her the answer :/

Answer 29

You're awesome.

Answer 30

lol...thats a matter of opinion

Answer 31

thank you

Answer 32

Thank you to all who helped. @primralph Why do you assume I am ungrateful? I lost internet connection due to the storm. Thank you for helping.

Answer 33

@lissa_bug I did not assume that.
Newbies just forget to give medals most times.

Answer 34

And what storm?

Answer 35

There is severe thunder storms in my area.

Answer 36

You scared?

Answer 37

Nope. If I die, oh well. :)

Answer 38

Superwoman. I feel you.