% The same inputs as from prob_10.8.1.inp:
%
M = [
   385.910       32.530       40.400       29.950       19.720       14.040       73.470       48.170       59.990        6.120   
    36.050      492.010       79.250       77.960       42.470       69.250       13.160       11.380        7.690       92.370   
    86.300       40.630      599.580       42.620       90.550       19.440       68.800       95.530       89.370       18.150   
    66.340       50.890       49.690      490.350       79.840       68.410       19.780       53.310       16.580       78.770   
    58.440       51.620       41.200       37.690      456.530       82.660        6.940       41.740       93.040       13.620   
    34.110       79.340       53.260       81.300       21.960      631.710       99.730       89.750       39.340       89.110   
     7.910        5.670       40.000       56.590       11.410       19.840      309.340       30.190       72.150       40.580   
     8.950       30.590       91.200       49.150       67.280       20.780       31.810      459.340       61.520       24.850   
    85.840       94.630        4.190       39.090       75.930       25.150       81.910       75.660      518.540       21.240   
    64.770       21.810       25.920        4.770       77.410       36.330       23.610        2.410       65.510      417.310   
];
b = [ 84.93 89.26 10.97 30.32 72.54 37.64 96.92 24.63 34.42 56.43 ];

% The true solution:
%
x = M \ (b.');
format long;
x.'