X+2y>12; 2x+y>12; x>0; y>0

x+2y > 12
2x+y >12
x > 0 ; y > 0

cari titik
x = 0
x + 2y = 12
0 + 2y = 12
2y = 12
y = 6

y=0
x + 2y = 12
x + 2(0) = 12
x=12
jadi titiknya (12,6)

x= 0
2x+y=12
2(0)+y=12
y=12

y= 0
2x+y=12
2x+0=12
2x=12
x=6
jadi titiknya (6,12)