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Oksana_A [137]
3 years ago
14

PLEASE HELP AND EXPLAIN!

Mathematics
1 answer:
Neko [114]3 years ago
8 0

Answer:

12 years old.

Step-by-step explanation:

1) 2x+x=18

2) Now solve 2x+x=18

Add alike terms

3x=18

Now divide both sides by 3 (3x/3 and 18/3)

x=6

So Hannah is 6 years old. Her sister must be 12.

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