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x - 4y = 16
6x + 4y = -16
Ditanya :
x dan y?
Jawab :
x - 4y = 16
x = 4y + 16
6x + 4y = -16
6(4y + 16) + 4y = -16
24y + 96 + 4y = -16
28y = -112
y = -4
x = 4y + 16
x = 4(-4) + 16
x = -16 + 16
x = 0