MATLAB Please!

I have been working on this program but cant figure out why Im getting this error

Error using fprintf

Function is not defined for 'sym' inputs.

syms x y z

eq1=2*x+y+z==2

eq2=-x+y-z==3

eq3=x+2*y+3*z==-10

test1=solve(eq1,eq2,eq3)

test1.x % notice results are in structure

test1.y

test1.z

fileID = fopen('test2.txt','w');

fprintf(fileID,' x = %9.2f y = %9.2f z = %9.2f',x,y,z);

fclose(fileID);