posted by Evelyn

Aaron is 13 years older than shelby. in nine years, Aaron will be twice as old as shelby. how old is shelby?

  1. Steve

    a = s+13
    (a+9) = 2(s+9)

    a - s = 13
    a - 2s = 9

    s = 4
    a = 17
    in 9 years:
    s = 13
    a = 26

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