Question 250005
19. Give the solution for a system with the augmented matrix shown below
<pre><font size = 4 color = "indigo"><b>
{{{(matrix(2,4,1,0,":",2, 0,1,":",-3))}}} is the augmented matrix
form of the system:

{{{system(1x+0y=2,0x+1y=-3)}}}

which simplifies to

{{{system(x=2,y=-3)}}}

</pre></font></b>
18. Write the system of linear equations represented by the matrix equation shown below
<pre><font size = 4 color = "indigo"><b>
{{{(matrix(3,3,1,-1,1,2,1,3,4,2,-1))*(matrix(3,1,x,y,z))=(matrix(3,1,1,-3,2))}}}

is the matrix equation AX=B form of the system:

{{{system(1x-1y+1z=1, 2x+1y+3z=-3,4x+2y-1z=2)}}}
 
Erasing the 1's

{{{system(x-y+z=1, 2x+y+3z=-3,4x+2y-z=2)}}}

Edwin</pre>