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Alja [10]
3 years ago
5

Hey can some one please help

Mathematics
1 answer:
sineoko [7]3 years ago
6 0

Answer:

A.

Step-by-step explanation:

< means open circles

x-21<3  x≥21

-x+21<3  x<21

18<x<21 and 21≤x24

so the union of will be 18<x<24

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