Sunday

February 1, 2015

February 1, 2015

Posted by **illeana** on Saturday, May 19, 2012 at 4:35am.

2 if A > B > C > D, find the digits A,B,C,D which are from 1 to 9 so that ABCD-DCBA=BDAC

3 solve x+y=28 xy=127

- maths -
**Steve**, Saturday, May 19, 2012 at 4:47am1) is that x + (1/x) or (x+1)/x?

2)

7641 - 1467 = 6174

3)

(x,-y) = (14±√69)

- maths -
**choco**, Sunday, May 20, 2012 at 4:49amit is x+(1/x)

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