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n + 9 = 5
n = 5 - 9
n = -4
2.
-8 - n = -1
-n = -1 + 8
-n = 7
n = -7
3.
-n + 6 = 0
-n = -6
n = 6
2.(-8)-(-7)=-1
3.-6-(-6)=0
tolong jadikan jawaban terbaik.