Posted by amelie on Monday, October 18, 2010 at 5:37pm.
If Leah is 6 years older than Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue? How do you know what and, is, and older mean in mathematical terms?

math  Reiny, Monday, October 18, 2010 at 5:42pm
Since Leah is mentioned twice, let's define her age as x yrs.
then Sue is x6
and John is x+5
so x + x6 + x+5 = 41
3x = 42
x = 14
Leah is 14
Sue is 8
John is 19

math  Ms. Sue, Monday, October 18, 2010 at 5:44pm
s + s + 6 + s + 11 = 41
3s + 17 = 41
3s = 41  17
3s = 24
s = 8
Sue is 8
Leah is 14
John is 19
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