math

posted by Becky1

If Leah is 6 years older than her sister, sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue?

1. Ms. Sue

Let s equal Sue's age.

s + s + 6 + s + 11 = 41
3s + 17 = 41
3s = 24
s = ?

2. Becky1

How did you get 11?

3. Ms. Sue

John is 11 years older than Sue.

4. Becky1

what eqaution did you use to find out that john is 11 years older thsn Sue?

5. Ms. Sue

I didn't use an equation. I read the problem and used common sense and basic arithmetic.

Leah is 6 years older than Sue.
John is 5 years older than Leah.
Therefore John is 11 years older than Sue.

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