Question 1184538
The problem is to maximize P = x + 1.50y + 3.75z, subject to


{{{system(matrix(3,1,x+y+z <= 320, -x+y+z <= 0, -y + z <= 0))}}}, with {{{"x, y , z" >=0}}}


You can then go to http://reshmat.ru/simplex_method_lpp.html  to implement the simplex method.


What you will get in the end are x = 160, y = 80, and z = 80, with maximum P  = 580.