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  • Nov 24, 2006, 12:02 PM
    mathgrl_3905
    Age problems
    Could anybody help me out with this? I keep on trying this problem but end up with the wrong answer each time.

    Mark is 10 years younger than Larry. Larry's age 8 years from now will exceed twice Mark's age 3 years ago by 4 years. How old is each now?
  • Nov 24, 2006, 12:54 PM
    galactus
    Mark is 10 yrs younger than Larry: M=L-10

    "Larry's age 8 years from now will exceed twice Mark's age 3 years ago by 4 years. How old is each now?".


    L+8=2(M-3)+4

    L+8=2((L-10)-3)+4

    Solve for L: L=30 and M=20

    Therefore, Larry is 30 and Mark is 20.

    Check the criteria:

    Larry's age 8 yrs from now=38

    Twice Mark's age 3 yrs ago=2(20-3)=34

    Will exceed by 4 years: 38-34=4

    There ya' go... QED.
  • Jan 19, 2011, 06:54 AM
    maggie2011
    m:x-10 l:x

    after 8 years,

    so x+8-2((x-10)-3)=4
    x=30

    m:20 l:30


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