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October 21, 2014

October 21, 2014

Posted by **Lucre** on Friday, August 8, 2008 at 6:10pm.

- math -
**Damon**, Friday, August 8, 2008 at 6:22pms = sister's age now

3s = Rodney's age now

s-1 = sister's age a year ago

3s-1 = Rodney's age a year ago

so

3s-1 = 4 (s-1)

3s - 1 = 4s - 4

I think you can take it from there.

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