- #1

- 103

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## Homework Statement

the original problem is in matrix form:

1 1 2 8

-1 -2 -3 1

3 -7 4 10

## Homework Equations

## The Attempt at a Solution

i got all the way to :

1 1 0 -4

0 1 0 1

0 0 1 2

however, the top row is supposed to = 3 but when i subtract row 2 from row 1 i get -5....i can't find where i messed up in the steps i did it. anyone get the same thing as me or know what i did wrong?