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Posted by **gilbert** on Tuesday, October 4, 2011 at 1:48am.

- math -
**Reiny**, Tuesday, October 4, 2011 at 8:12amJoan's earnings -- x

Charlie's earnings -- 3x/4

x + 3x/4 = 490

4x+3x=1960

x=280

joan -- 280 , charlie -- 210

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