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November 22, 2014

November 22, 2014

Posted by **xavier** on Thursday, March 22, 2012 at 6:58am.

- maths -
**Reiny**, Thursday, March 22, 2012 at 9:51ampresent ages:

Susan --- x

John ---- 3x

Four years from now:

Susan -- x+4

John --- 3x + 4

3x+4 = x+4 + 18

2x = 18

x = 9

Susan is now 9 and John is now 27

check:

in four years:

Susan = 13, John is 31

is 31 greater than 13 by 18 ? YES!!

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