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Solution of diff. equation i the form of list?


Hi!
Can you write how to get the solution of differential 
equation in the form of list.
I tried to achievie it in that way: 

DSolve[{z'[x]==-z[x],z[0]==1},z[x],x]
data=Table[{x,z[x] /. %},{x,0.0,1.5,0.1}]

 and I got:

{{z[x]->Exp[-x]}}
{{{0.0,{1.0}},{0.1,{0.8}}, etc
       ^   ^       ^   ^
   
How to get rid of above extra {}'s? 
If I use "data" list in "ListPlot[data]" function I got errors.

If you know what to do please post or e-mail.

Thanks in advance.

             Best regards 
             Wojtek Wlazlo
             ufwlazlo at kinga.cyf-kr.edu.pl 


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