Question

System of 3 variable Linear Equations

a) 6x+18y-4z=-1, 11x+8y-9z=0, 3x-6y+0z=-7

Answer 1

x = -482/225, y = 43/450, z = -38/15

Answer 2

how do you do it?

Answer 3

6 18 -4 -1
11 8 -9 0
3 -6 0 -7

6 18 -4 -1
3 -6 0 -7
11 8 -9 0

12 36 -8 -2
11 8 -9 0
3 -6 0 -7

1 28 1 -2
3 -6 0 -7
11 8 -9 0

1 28 1 -2
0 -90 -3 -1
0 -300 -20 22

you work out the rest... I give up

Answer 4

How do you do the workings out? If you wrote it all out it would help a lot :)

Answer 5

the working out is actually a procedure, or an algorithm :-D
http://en.wikipedia.org/wiki/Gaussian_elimination

better: http://en.wikipedia.org/wiki/Gauss%E2%80%93Jordan_elimination