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6 September, 15:43

One number is 3 less than a second number. Twice the second number is 15 less than 5 times the first. Find the two numbers.

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  1. 6 September, 16:10
    0
    7 and 10

    Step-by-step explanation:

    let x and y be our unknown numbers

    x = y - 3

    2 y = 5x - 15

    ...

    2y = 5 (y - 3) - 15

    2y = 5y - 15 - 15

    -3y = - 30

    y = 10

    x = 10 - 3 = 7
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