Chemical Equilibrium  |POLVER05_1
f(x1) = 0.5*x1+x2+0.5*x3-x6/x7   #
f(x2) = x3+x4+2*x5-2/x7   #
f(x3) = x1+x2+x5-1/x7   #
f(x4) = -28837*x1-139009*x2-78213*x3+18927*x4+8427*x5+13492/x7-10690*x6/x7   #
f(x5) = x1+x2+x3+x4+x5-1   #
f(x6) = 400*x1*x4^3-1.7837e5*x3*x5   #
f(x7) = x1*x3-2.6058*x2*x4   #
x1(0)=0.5
x2(0)=0
x3(0)=0
x4(0)=.5
x5(0)=0
x6(0)=0.5
x7(0)=2