# Matrix with unknown constants

1. Aug 26, 2012

### bonfire09

1. The problem statement, all variables and given/known data

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=?

2. Relevant equations

3. 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.

Last edited: Aug 26, 2012
2. Aug 26, 2012

### bonfire09

would i have to use reduced echelon form?

3. Aug 26, 2012

### HallsofIvy

Staff Emeritus
Could you please state the entire problem? Find h and k so that what is true about the system? That there exist a unique solution or that the exist many solutions or that there is no solution?

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

Last edited by a moderator: Aug 27, 2012
4. Oct 12, 2012

### LanieH

Hi,
I have an equation with one unknown. This is the 'B' in the equation. I need to solve for 'B'. Can you help me to rearrance this complex equation to solve for B in terms of everything else please?

=(() - (DCRMgAl)) ∗ ^(−∗(()+()))+ ((DCRMgAl )- (DCRAl ))∗ ^(−∗∗() )+((Al) - (DCRMg)) ∗ ^(−∗(()+()))