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18 May, 10:00

From 5 times a certain number, 189 is subtracted, and the remainder is one half the original number. What is that number?

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  1. 18 May, 11:50
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    210

    Step-by-step explanation:

    Let the number be n. Then:

    5n - 189 = (1/2) n. Multiplying all 3 terms by 2 to eliminate the fractional coefficient, we get:

    10n - 1890 = n, or

    9n = 1890.

    Dividing both sides by 9 yields n = 210
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