SOLUTION: Solve for unknown variables can you please show steps in detail 3x+3y=3 -3x-2z=-11 y+z=-1

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Question 1021464:
Solve for unknown variables
can you please show steps in detail
3x+3y=3 -3x-2z=-11 y+z=-1

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!

1.
.
.

2.
.
.
3.
From eq. 3,

Substitute into eq. 1,

4.
Multiply eq. 4 by 2 and add to eq. 2 to eliminate z.



Then from eq. 4,


and finally from eq. 3,



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