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January 30, 2015

January 30, 2015

Posted by **Michael** on Monday, November 7, 2011 at 6:40pm.

- Mathematics -
**declan**, Monday, November 7, 2011 at 7:36pmLet Mary=Y Peter=X

Mary is 2/3 Peter's age therefore:

Y =2/3X

two years ago..mary was 1/2 peter's age in 5 years..we write the equation as:

(Y) -2 = 1/2(x+5)

substitute Y=2/3X

2/3X - 2 = 1/2x + 5/2

solve for X

X=27.....therefore Y=18

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