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2. 2x - z = (2(-15) - (-6)) : (-3)
= (-30 + 6) : (-3)
= -24 : (-3)
= 8 (C)
= x - 6y -2 maka koefisien y = -6 :)
2. 2x-z / y
<=> 2(-15) - (-6) / - 3
<=> -30 + 6 / -3
<=> -24 / -3 = 8 :)
Jadi jawaban nmer 1 = b , nmer 2 = c :)