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31 January, 16:27

One positive number is 8 times another number. Their difference is 70. Which of the following equations could be used to find the numbers? x - 8x = 70 8x - x = 70 x - 8 = 70

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  1. 31 January, 20:13
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    A = first number (larger number)

    b = second number (smaller number)

    a = 8b

    a - b = 70 *

    * since a is the larger number and their difference is positive, we want a-b.

    plug the first equation into the second to get:

    a - b = 70

    (8b) - b = 70

    8b - b = 70

    Your correct answer would be choice #2.
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