Posted by **Katie** on Monday, March 5, 2007 at 10:57am.

If Leah is 6 yr.s older than sister, Sue, & John is 5 yrs. older than Leah, and the total of their ages is 41. How old is Sue? Still having problems setting the problem up. Have hit a brick wall. Any suggestions?

Have you tried algebra?

Let J = John's age

L = Leah's age = J - 5

S = Sue's age = L -6

L + S + J = 41

Next make these substitutions into the above equation to get rid of L and J in that equation. Use

J = 5 + L = S + 11

L = S + 6

Then you can solve for S.

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