N - 6 < -4 Add 6 to each side of the inequality :
N < 2 .
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It is a double inequality defining an interval. -1 ≤ n+2 ≤ 6 implies -3 ≤ n ≤ 4
6 less than a number n is n-6 This is because "n" is the variable; the number. Since the problem is 6 less than a number, you would start with writing subtract 6, which is -6, and then put n before it, subtracting 6 from n, which gives you n-6. ----
6-n/ (n/2)-6
5.25
4n-6