exam Maths Puzzle Numerical Ability

Using Gauss-Jordan elimination- solve following system of equations.

x+y+z=2
2x-3y+z=-11
-x+2y-z=8

I think it is x= 1/3, y=10/3, z=-5/3

Am I correct?
Thanks

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exam Other Question

Graph inequality using the test point method

4x + 3y >24
I am a Grandma in a jam! I am trying to help my grandson figure out a couple of Algebra questions and I need help!! Can someone please show me the logorithimic form of the equation:
(1/3)^-4 = 81????? Help, Please. Thank YOu!