5n - 1 ≥ 6
Add 1 to both sides: 5n ≥ 7
Divide both sides by 5: n ≥ 7/5 = 1.4
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No.
-3<6 The inequality sign for less than is <
This isn't an inequality, since there is no less-than, greater-than, less-than-or-equal, or greater-than-or-equal sign. However, solving inequalities is similar to solving equations; however, when you multiply by a negative number, you must change the direction of the inequality sign.
9
x ∉ {-6, 6}