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-5x + 2y = 27
__________ -
6x. = 18
x = 18 : 6
x = 3
masukkan ke kalimat matematika yg pertama
x + 2y = 9
3 + 2y = 9
2y = 9 - 3
2y =6 jadi y = 6:2= 3
(3,3)