Question 838113
{{{(matrix(3,3,2,3,-1,1,-1,-1,-4,3,1))*(matrix(3,1,x,y,z))=(matrix(3,1,-8,-2,6))}}}
{{{(matrix(3,1,x,y,z))=-(1/14)*(matrix(3,3,-2,6,4,-3,2,-1,1,18,5))*(matrix(3,1,-8,-2,6))}}}
{{{(matrix(3,1,x,y,z))=(matrix(3,1,-2,-1,1))}}}