这个约束可以用LINGO来解么?求程序.
问题描述：
这个约束可以用LINGO来解么?求程序.
min (4.5b+1.5d+e+f+g+h+0.5i+0.5j+0.5k+0.5l)/(22.5a+27b+22.5c+24d+7e+8.5f+7g+8.5h+6.5i+8j+6.5k+8l)
st
470>=22.5a+27b+22.5c+24d+7e+8.5f+7g+8.5h+6.5i+8j+6.5k+8l-4.5b-1.5d-e-f-g-h-0.5i-0.5j-0.5k-0.5l>=412
a+b
答
min=(4.5*b+1.5*d+e+f+g+h+0.5*i+0.5*j+0.5*k+0.5*l)/(22.5*a+27*b+22.5*c+24*d+7*e+8.5*f+7*g+8.5*h+6.5*i+8*j+6.5*k+8*l);
470>=22.5*a+27*b+22.5*c+24*d+7*e+8.5*f+7*g+8.5*h+6.5*i+8*j+6.5*k+8*l-4.5*b-1.5*d-e-f-g-h-0.5*i-0.5*j-0.5*k-0.5*l;
22.5*a+27*b+22.5*c+24*d+7*e+8.5*f+7*g+8.5*h+6.5*i+8*j+6.5*k+8*l-4.5*b-1.5*d-e-f-g-h-0.5*i-0.5*j-0.5*k-0.5*l>=412;
a+b