Question

Solve these system of equations. Please show your work.
2w - x + 5y + z = -3
3w + 2 x + 2y - 6z = -32
w + 3x + 3y - z =-47
5w -2 x - 3y + 3z = 49

Answer 1

Heeey @ChmE sorry I had lost my internet connection

Answer 2

Anyways...no I haven't studied matrices yet

Answer 3

have you done matrices yet

Answer 4

No i haven't :S

Answer 5

ok so I'll teach the elimination method. This is the easiest when you have so many equations.

Answer 6

Alright!

Answer 7

There is a couple ways to do it. we can tackle to equations at a time, easier method.
Or we can do all 4 at once, requires more thought but faster. What do you want to do

Answer 8

two**

Answer 9

I say we do two at a time for now.

Answer 10

Lets take equations 1 and 3 to start. I chose these because they both have 1z and they happen to be opposites. We r going to add these equations together.

2w - x + 5y + z = -3
w + 3x + 3y - z = -47
3w + 2x + 8y = -50 (added 1 & 3)

Answer 11

Are you still with me?

Answer 12

Answers brought to you by http://www.bluebit.gr/matrix-calculator/linear_equations.aspx
w=2
x=-12
y=-4
z=1
Call me back if you want to learn elimination

Answer 13

Thanks!!