Question 836392
{{{(matrix(3,3,1,4,-1,1,1,-6,3,-1,-1))*(matrix(3,1,x,y,z))=(matrix(3,1,-5,-12,4))}}}
Find the inverse,
{{{(matrix(3,1,x,y,z))=-(1/71)*(matrix(3,3,-7,5,-23,-17,2,5,-4,13,-3))*(matrix(3,1,-5,-12,4))}}}
{{{(matrix(3,1,x,y,z))=-(1/71)*(matrix(3,1,-117,81,-148))}}}