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x = 4-2y
3x +2y = 12
3(4-2y) + 2y = 12
12- 6y +2y = 12
-4y = 0
y= 0
x = 4-2y = 4 - 0 = 4
Hp = (4,0)
x+2y=4..............(2)
eliminasi:
3x+2y=12
x+2y=4
---------- (-)
2x=8
x=4
subsitusi:
3x+2y=12
3(4)+2y=12
12+2y=12
2y=12-12
y=0
maka x=4 dan y=0