 
   
     Hi dear R users,
   
  Is it basically correct that a problem is ( linearly on nonlinearly ) modeled so that the slack variable is bounded by an upper bound ?
   
  If so, how it can be handled and coded practically ?
   
  for example:
   
  x1+ x2 =< b   so ---->  x1 + x2 + s=b
   
  s=b- x1 - x2
   
  b- x1 - x2 =< upper value
   
  But algorithms can not calculate b- x1 - x2 , because the matrices are not compatible. Or how can it be well coded ?
   
  Thank you so much.
  Amir

       
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