请问如何用matlab计算下列线性方程组？ 用用MATLAB求线性方程组？
\u5982\u4f55\u7528matlab\u6c42\u89e3\u7ebf\u6027\u65b9\u7a0b\u7ec4\u4f60\u7684\u95ee\u9898\u63d0\u7684\u8303\u56f4\u592a\u5927\u4e86\u3002\u6709\u5177\u4f53\u7684\u7ebf\u6027\u65b9\u7a0b\u7ec4\u5417\uff1f
\u4e00\u822c\u6c42\u89e3\u7ebf\u6027\u65b9\u7a0b\u7ec4\u7684\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u6709\uff0csolve\u51fd\u6570\uff0cx=A/b\uff08A\u662f\u7ebf\u6027\u65b9\u7a0b\u7ec4\u7684\u7cfb\u6570\uff0cb\u662f\u7b49\u5f0f\u503c\uff09\uff0cx=inv(A)*b\uff08inv(A)\u662fA\u7684\u9006\u77e9\u9635\uff09\u7b49\u7b49\u3002
\u4e0d\u662f\u5b66\u8fd9\u4e2a\u4e13\u4e1a\u7684\u3002\u771f\u7684\u4e0d\u4f1a\u5440\uff0c\u5e0c\u671b\u6709\u5b66\u8fd9\u4e2a\u4e13\u4e1a\u6216\u61c2\u8fd9\u4e2a\u4e1c\u897f\u7684\uff0c\u53ef\u4ee5\u5e2e\u4f60\u89e3\u7b54\u8fd9\u4e2a\u95ee\u9898\u5427\u3002
用matlab计算线性方程组，可以这样来计算。
方法一：X=A\B 矩阵除法
A=[2 1 1;3 1 2;1 2 2];
B=[4;0;3];
X=A\B
方法二：X=inv(A)*B 逆矩阵法
X=inv(A)*B
运行上述代码，可以得到该线性方程组的解。
方法三：用solve 函数，也解三元一次方程组。
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