matlab解多元非线性方程 lg(x1*x2/x4)=5.317-9393/1600lg(x1*x3/(1-x4))=5.9-16580/1600(0.002-x1)/(0.0989-x2)=48/x4*12(0.002-x1)/(0.0048-x3)=48/(1-x4)/14如何求解x1,x2,x3,x4

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