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Graphing Linear Inequalities
x ≤ y means x is less than or equal to y.
x ≥ y means x is greater than or equal to y.
x < y means x is less than y.
x > y means x is greater than y.
Algebra of Inequalities
x + 3 < 8.
Addition works like for equations:
x + 6 < 11 ( added 3 to each side ).
x + 2 < 7 ( subtracted 4 from each side ).
2x + 12 < 22 ⇒ x + 6 < 11
(each side is divided by 2 or multiplied by 1/2).