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3y ≤ 18
y ≤ 6
6. k + 6 > 3k
k - 3k > -6
-2k > -6 (karena dikali -1 arah jadi berbalik)
k < 3
7. 3p + 3 <21 +6p
3p - 6p < 21 -3
-3p < 18 (karena dikali -1 arah jadi berbalik)
p < -6
9. 2(4z - 3) > 3 (2z - 4)
8z - 6 > 6z -12
8z-6z > -12+6
2z > -6
z > -3
say lanjutkan kl ada waktu