nardosem9
08.04.2021 •
Mathematics
Which of the following is the correct expanded form for the series below?
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Ответ:
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.