Question 964779
Find the determinant of the system and set it equal to zero,
{{{A=(matrix(3,3,1,1,3,-4,2,5,k,0,1))}}}
{{{abs(A)=1(2(1)-5(0))+1(5k+4)+3(-4(0)-2k)}}}
{{{abs(A)=6-k)}}}
{{{6-k=0}}}
{{{highlight(k=6)}}}