incorrect result in solving system using MATLAB ?

Iam trynig to solve the following system (mat=coefficient matrix,B=output matrix)

mat =
       1     2     6
       2     5    14
       5     7    24
B=
   0
   0
   0

the expected result is not zeros for sure because this system is linear dependent . And I used mat/B and linsolve(mat,B). However , I have got the answer

ans=
       0 
       0 
       0

and this warning

Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND =
1.009294e-18.

could any one help me why I got this result and what I should to get the correct answer?

[Walter Roberson]

Duplicated by later https://www.mathworks.com/matlabcentral/answers/367058-incorrect-result-in-solving-system-using-matlab which has an answer