Question 842049
{{{(matrix(2,2,2,-3,-10,9))*(matrix(2,1,x,y))=(matrix(2,1,2,-8))}}}
{{{1/x=Dx/D=abs(matrix(2,2,2,-3,-8,9))/abs(matrix(2,2,2,-3,-10,9))=(-6)/(-12)=1/2}}}
{{{1/y=Dy/D=abs(matrix(2,2,2,2,-10,-8))/abs(matrix(2,2,2,-3,-10,9))=4/-12=-1/3}}}
{{{x=2}}}
{{{y=-3}}}