[求助]大虾们帮我看看这段程序

sekay

eq1=sym('x1=0.5617+0.03825*x2-0.001116*x2^2');<BR>eq2=sym('x7=98+4.5*x2-0.3611*x2^2');<BR>eq3=sym('x4=288.15*(x2^0.286-1)/(0.5617+0.03825*x2-0.001116*x2^2)+288.15');<BR>eq4=sym('x5=(0.0397*0.95*101325*x2*0.072325/x7)^2');<BR>eq5=sym('x6=x5*(0.26397/x3*0.072325)^2');<BR>eq6=sym('x8=x7*1081.51*(x5-x4)/(0.98*0.43*100000000)');<BR>eq7=sym('x3=(0.91/(0.91-x5/x6))^(1/0.248)');<BR>eq8=sym('x2=(1158.31*x5*(1-x3^(-0.248))*0.91*0.99*x1/(1004.71*28.15)+1)^(-1/0.248)');<BR>solve(eq1,eq2,eq3,eq4,eq5,eq6,eq7,eq8,'x1','x2','x3','x4','x5','x6','x7','x8')<BR><BR>运行结果：<BR>Warning: Explicit solution could not be found.<BR>&gt; In C:\MATLAB6p5\toolbox\symbolic\solve.m at line 136<BR>  In C:\MATLAB6p5\toolbox\symbolic\@sym\solve.m at line 49<BR> <BR>ans =<BR> <BR>[ empty sym ]<BR><BR>这个程序是求解单轴涡轮喷气式发动机状态诊断问题的数学模型中十个方程 要求就是解出这十个方程中的未知量'x1','x2','x3','x4','x5','x6','x7','x8'  但一运行就这样了，在线等待求助！