Question

Solve the system of equations.
x + y - z = -1
x + y + z = 3
3x - 2y - z = -4

Answer 1

Matrices?

Answer 2

huh?

Answer 3

What method so you wanna use?

Answer 4

*do

Answer 5

I tried elimination but I couldn't get it to work

Answer 6

Cramer's rule?

Answer 7

Sorry about that. The only way I know is matrices, it's like elimination but without variables

Answer 8

Well show me that way, I've never heard of it

Answer 9

So far I've got 10 is the determinant... if you use Cramers Rule you replace the first column with (-1, 3, -4) ... find the determinant of that... divide that determinant by your original which is 10. to get y repeat this menthod wit hthe second column

Answer 10

@Luigi0210 how do I do matrices

Answer 11

Have you seen this before: