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can you set up the matrix?

Yes:
-1 -3 | -17
2 -6 | 26

Your next step is to make the upper left corner equal to 1. How do we do this?

What do we multiply -1 by to get 1 ?

-1 times ??? = 1

-1.

so do this across the entire first row....ie multiply EVERY number in row 1 by -1

-1 -3 | -17
2 -6 | 26
1 3 | 17 -1*R1
2 -6 | 26

The notation -1*R1 means "-1 times Row 1"

Okay so it would be:
1 3 | 17 right?

yes it would be

oh sry, i made a typo
the second row should be
2 -6 | -26
instead of
2 -6 | 26

You would make the 2 a zero my by multiplying it by 0..? I think..

well if you did that, everything in row 2 would become 0

then you'd get 0x + 0y = 0...which is completely useless now

Oh. That's true..

Instead, you can add/subtract multiples of row 1 to row 2

So does that mean we would subtract 2 from row 2?

Notice in the first column we have
1
2

Okay.
So does that mean that row 2 looks like this now:
0 -6 | -26

not quite

-6 - 2*(-3) = -12
so the 2nd element in row 2 is -12

Ugh, I'm so confused - lol, these kinds of probles frustrate me! :P

-26 - 2*17 = -60

so the 3rd element in row 2 is -60

after this, you should have
1 3 | 17
0 -12 | -60

what's next?