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12 April, 09:17

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

Which of the following equations could be used to solve the problem?

x + 6 = 2 (3 x + 6)

3 x + 6 = 2 x + 6

3 x + 2 x

3 x + 6 = 2 (x + 6)

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  1. 12 April, 09:57
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    Answer: 3x+6 = 2 (x+6)

    Step-by-step explanation:

    Ralph's age: y; Sara's age: x

    Ralph is 3 times as old as Sara: y = 3x

    In 6 years, Ralph will be only twice as old as Sara will be then: (y+6) = 2 (x+6)

    Substitute y=3x into (y+6) = 2 (x+6).

    3x+6 = 2 (x+6)
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