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13 November, 16:25

Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now. If x represents Sarah's age now, which of the following expressions represents Ralph's age in four years?

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  1. 13 November, 16:27
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    R (c) = Ralph's current age

    R (c) = 3x [given]

    Answer:

    R (c) = 2x + 4

    The 2 represents how much older Ralph is than Sarah, then the plus 4 equals the amount of years that has gone by since Sarah's original age.
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