# Matrix with unknown constants

## Homework Statement

Suppose are h and k are unknown constants.
The equations are:
-3x-5y-6z=-4
8x+6y-9z=8
19x+17y+hz=k

if h≠A then A=?

## The Attempt at a Solution

I know that h is some number so that this system of equations has one or more solutions. Yet I'm having trouble where to start.

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would i have to use reduced echelon form?

HallsofIvy
You say 'if $h\ne A$ then A= ?' where did "A" come from?