Question: Cannot solved it...why?

Warning, computation interrupted

> solve({x11*x11+x12*y11+x13*z11=x11*x11+x12*x21+x13*x31,

x11*x12+x12*y12+x13*z12=x11*x12+x12*x22+x13*x32,

x11*x13+x12*y13+x13*z13=x11*x13+x12*x23+x13*x33,

x11*x21+x12*y21+x13*z21=x21*x11+x22*x21+x23*x31,

x11*x22+x12*y22+x13*z22=x21*x12+x22*x22+x23*x32,

x11*x23+x12*y23+x13*z23=x21*x13+x22*x23+x23*x33,

x11*x31+x12*y31+x13*z31=x31*x11+x32*x21+x33*x31,

x11*x32+x12*y32+x13*z32=x31*x12+x32*x22+x33*x32,

x11*x33+x12*y33+x13*z33=x31*x13+x32*x23+x33*x33,

x21*x11+x22*y11+x23*z11=y11*x11+y12*x21+y13*x31,

x21*x12+x22*y12+x23*z12=y11*x12+y12*x22+y13*x32,

x21*x13+x22*y13+x23*z13=y11*x13+y12*x23+y13*x33,

x21*x21+x22*y21+x23*z21=y21*x11+y22*x21+y23*x31,

x21*x22+x22*y22+x23*z22=y21*x12+y22*x22+y23*x32,

x21*x23+x22*y23+x23*z23=y21*x13+y22*x23+y23*x33,

x21*x31+x22*y31+x23*z31=y31*x11+y32*x21+y33*x31,

x21*x32+x22*y32+x23*z32=y31*x12+y32*x22+y33*x32,

x21*x33+x22*y33+x23*z33=y31*x13+y32*x23+y33*x33,

x31*x11+x32*y11+x33*z11=z11*x11+z12*x21+z13*x31,

x31*x12+x32*y12+x33*z12=z11*x12+z12*x22+z13*x32,

x31*x13+x32*y13+x33*z13=z11*x13+z12*x23+z13*x33,

x31*x21+x32*y21+x33*z21=z21*x11+z22*x21+z23*x31,

x31*x22+x32*y22+x33*z22=z21*x12+z22*x22+z23*x32,

x31*x23+x32*y23+x33*z23=z21*x13+z22*x23+z23*x33,

x31*x31+x32*y31+x33*z31=z31*x11+z32x*21+z33*x31,

x31*x32+x32*y32+x33*z32=z31*x12+z32*x22+z33*x32,

x31*x33+x32*y33+x33*z33=z31*x13+z32*x23+z33*x33,

y11*x11+y12*y11+y13*z11=x11*y11+x12*y21+x13*y31,

y11*x12+y12*y12+y13*z12=x11*y12+x12*y22+x13*y32,

y11*x13+y12*y13+y13*z13=x11*y13+x12*y23+x13*y33,

y11*x21+y12*y21+y13*z21=x21*y11+x22*y21+x23*y31,

y11*x22+y12*y22+y13*z22=x21*y12+x22*y22+x23*y32,

y11*x23+y12*y23+y13*z23=x21*y13+x22*y23+x23*y33,

y11*x31+y12*y31+y13*z31=x31*y11+x32*y21+x33*y31,

y11*x32+y12*y32+y13*z32=x31*y12+x32*y22+x33*y32,

y11*x33+y12*y33+y13*z33=x31*y13+x32*y23+x33*y33,

y21*x11+y22*y11+y23*z11=y11*y11+y12*y21+y13*y31,

y21*x12+y22*y12+y23*z12=y11*y12+y12*y22+y13*y32,

y21*x13+y22*y13+y23*z13=y11*y13+y12*y23+y13*y33,

y21*x21+y22*y21+y23*z21=y21*y11+y22*y21+y23*y31,

y21*x22+y22*y22+y23*z22=y21*y12+y22*y22+y23*y32,

y21*x23+y22*y23+y23*z23=y21*y13+y22*y23+y23*y33,

y21*x31+y22*y31+y23*z31=y31*y11+y32*y21+y33*y31,

y21*x32+y22*y32+y23*z32=y31*y12+y32*y22+y33*y32,

y21*x33+y22*y33+y23*z33=y31*y13+y32*y23+y33*y33,

y31*x11+y32*y11+y33*z11=z11*y11+z12*y21+z13*y31,

y31*x12+y32*y12+y33*z12=z11*y12+z12*y22+z13*y32,

y31*x13+y32*y13+y33*z13=z11*y13+z12*y23+z13*y33,

y31*x21+y32*y21+y33*z21=z21*y11+z22*y21+z23*y31,

y31*x22+y32*y22+y33*z22=z21*y12+z22*y22+z23*y32,

y31*x23+y32*y23+y33*z23=z21*y13+z22*y23+z23*y33,

y31*x31+y32*y31+y33*z31=z31*y11+z32*y21+z33*y31,

y31*x32+y32*y32+y33*z32=z31*y12+z32*y22+z33*y32,

y31*x33+y32*y33+y33*z33=z31*y13+z32*y23+z33*y33,

z11*x11+z12*y11+z13*z11=x11*z11+x12*z21+x13*z31,

z11*x12+z12*y12+z13*z12=x11*z12+x12*z22+x13*z32,

z11*x13+z12*y13+z13*z13=x11*z13+x12*z23+x13*z33,

z11*x21+z12*y21+z13*z21=x21*z11+x22*z21+x23*z31,

z11*x22+z12*y22+z13*z22=x21*z12+x22*z22+x23*z32,

z11*x23+z12*y23+z13*z23=x21*z13+x22*z23+x23*z33,

z11*x31+z12*y31+z13*z31=x31*z11+x32*z21+x33*z31,

z11*x32+z12*y32+z13*z32=x31*z12+x32*z22+x33*z32,

z11*x33+z12*y33+z13*z33=x31*z13+x32*z23+x33*z33,

z21*x11+z22*y11+z23*z11=y11*z11+y12*z21+y13*z31,

z21*x12+z22*y12+z23*z12=y11*z12+y12*z22+y13*z32,

z21*x13+z22*y13+z23*z13=y11*z13+y12*z23+y13*z33,

z21*x21+z22*y21+z23*z21=y21*z11+y22*z21+y23*z31,

z21*x22+z22*y22+z23*z22=y21*z12+y22*z22+y23*z32,

z21*x23+z22*y23+z23*z23=y21*z13+y22*z23+y23*z33,

z21*x21+z22*y21+z23*z21=y21*z11+y22*z21+y23*z31,

z21*x22+z22*y22+z23*z22=y21*z12+y22*z22+y23*z32,

z21*x23+z22*y23+z23*z23=y21*z13+y22*z23+y23*z33,

z31*x11+z32*y11+z33*z11=z11*z11+z12*z21+z13*z31,

z31*x12+z32*y12+z33*z12=z11*z12+z12*z22+z13*z32,

z31*x13+z32*y13+z33*z13=z11*z13+z12*z23+z13*z33,

z31*x21+z32*y21+z33*z21=z21*z11+z22*z21+z23*z31,

z31*x22+z32*y22+z33*z22=z21*z12+z22*z22+z23*z32,

z31*x23+z32*y23+z33*z23=z21*z13+z22*z23+z23*z33,

z31x*31+z32*y31+z33*z31=z31*z11+z32*z21+z33*z31,

z31*x32+z32*y32+z33*z32=z31*z12+z32*z22+z33*z32,

z31*x33+z32*y33+z33*z33=z31*z13+z32*z23+z33*z33},{x11,x12,x13,x21,x22,x23,x31,x32,x33,y11,y12,y13,y21,y22,y23,y31,y32,y33,z11,z12,z13,z21,z22,z23,z31,z32,z33});