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30 November, 09:58

randy and sandy are brother and sister. Randy is three less than twice Sandy's age. Together, their ages equal twent-four. How old is Sandy?

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  1. 30 November, 11:34
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    Sandy is 9 years old.

    Step-by-step explanation:

    R+S=24

    R=2S-3

    R=Randy, S=Sandy

    Plug the value of R into the first equation.

    2S-3+S=24

    Now, simplify.

    3S-3=24

    Now, solve the equation for S. First add three to both sides.

    3S=24+3=27

    3S=27

    Now divide both sides by 3.

    S=9
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