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2(2x + y) = 8
2x + y = 4 --> y = 4-2x ... Pers 1'
Substitusikan pers 1' ke 2x + 6y = 16
2x + 6(4-2x) = 16
2x + 24 - 12x = 16
-10x = -8
x = 4/5
Substitusikan x=4/5 ke y = 4-2x
y = 4 - 8/5
y = 12/5 = 2 2/5
Jadi x = 4/5 dan y = 12/5
Semoga dapat membantu :)