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Verified answer
Nomor 12 baiknya dgn grafik.(0,7) dan (7/2, 0)
(0,5) dan (5,0)
2x+y = 7
x+ y = 5
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x = 2
y = 3
(2,3)
titik objective (0,5) (7/2,0) dan (2,3)
f(x,y) = 4x + 5y
f(0,5) = 4.0 + 5.5 = 25
f(7/2,0) = 4.7/2 + 5.0 = 14
f(2,3) = 4.2 + 5.3 = 23
obj maks = 25