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October 21, 2014

October 21, 2014

Posted by **TUHITUHI** on Thursday, October 4, 2012 at 11:11am.

- math -
**Steve**, Thursday, October 4, 2012 at 11:34amIf there are c correct and w wrong answers,

c+w=180

4c-w = 220

c=80

w=100

check: 4*80-100=220

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