Carol H. answered 03/21/18
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Let x = Carlita's age
3[(1/2)x + 3] ≥ 12 Divide both sides by 3.
(1/2)x + 3 ≥ 4
(1/2)x ≥ 1
x ≥ 2
l l > 0 2
Put a solid circle on the number line above 2.