Expression 3: 20 "x" plus 13 "y" equals 2085 left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right brace20x+13y=2085x≥0y≥0
3
Expression 4: "x" positive "y" equals 120 left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right bracex+y=120x≥0y≥0
4
Hidden Label: left parenthesis, 75 , 45 , right parenthesis75,45