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18 September, 08:42

Joe is 5 years older than sally. in 15 years joe will be 3 times as old as sally is now. how old is sally now

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  1. 18 September, 09:05
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    Lets set up an equation for this:

    Let J = Joe

    S = Sally

    J = 5 + S

    15 + J = 3S

    Now solve for S (Sally) by substituting J (Joe) in the 2nd equation:

    15 + (5 + S) = 3S

    20 = 2S

    S = 10

    Therefore Sally is 10 years old.
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