[jAc]

利用下面的代码，取500组数据{x1,x2,x3},然后去平均值
t = 1; p = {}; While[t < 500, s = {}; n = 1;
While[n <= 3, T = RandomReal[{318, 388}];
s = Insert[s,
12.4037 + 1065/T - Log[T] + x1 + 0.6159/(x2*(x3 + T)) == 0, -1];
n++]; p =
Insert[p, {x1, x2, x3} /. Flatten[Solve[s, {x1, x2, x3}]], -1];
t++]
Mean[p]
这样就得到了平均值{-4.96599, -0.000332984, 50.2058}
做回归要知道拟合类型，你没有给，我就求不出了