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2x+4y=8
-7y=-21
y=3
masukkan ke persamaan 2
x+6=4
x=(-2)
x + 2y = 4 |x2| 2x + 4y = 8
_______________________-
. -7y = -21
. y = -21/-7
. y = 3
x + 2y = 4
x + 2.3 = 4
x + 6 = 4
x = 4 -6
x = -2