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2x+y<8 => 2x+y = 8
gunakan cara substitusi dan eliminasi :
x+3y=9 x2 => 2x+6y = 18
2x+y=8 x1 => 2x+y = 8 -
5y = 10
y = 10/5 = 2
x+3y = 9
x+3(2)=9
x = 9-6
= 3
fungsi objektif = x + 2y = 3+2(2) = 7