Question 852024
{{{(matrix(3,3,3,-6,3,1,3,-1,6,-1,-1))*(matrix(3,1,x,y,z))=(matrix(3,1,-3,0,17))}}}
{{{(matrix(3,1,x,y,z))=-(1/39)*(matrix(3,3,-4,-9,-3,-5,-21,6,-19,-33,15))*(matrix(3,1,-3,0,17))}}}
{{{(matrix(3,1,x,y,z))=(matrix(3,1,1,-3,-8))}}}