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April 17, 2014

April 17, 2014

Posted by **Kevin** on Monday, January 7, 2013 at 11:29pm.

- Math -
**abc**, Monday, January 7, 2013 at 11:34pmx=green marbles

y=blue marbles

x+y=57

x+13=y b/c there are 13 more blue marbles

substitute in to other equation

x+(x+13)=57

then solve for x, then for y add 13 to x

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