Question

谁会用lingo求解最优解，四个未知量

求W=11.25a+11.4b+11.15c+11.3-12.75的最小值 a+b>=30
a+b<=60
a+b+c>=60
a+b+c<=90
a+b+c+d>=70 abcd都为整数

Answer 1

min=11.25*a+11.4*b+11.15*c+11.3*d-12.75;
a+b>=30;
a+b<=60;
a+b+c>=60;
a+b+c<=90;
a+b+c+d>=70;