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4 December, 00:17

Twelve decreased by twice a number is the same as 8 times the sum of the number and 4. What is the number.

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  1. 4 December, 00:20
    0
    Answer: - 2

    Step-by-step explanation:

    Let the number be x, then twice the number is 2x.

    Twelve decreased by twice the number = 12 - (2x)

    8 times the sum of the number and 4 = 8 (x + 4)

    combining the two, we have

    12 - 2x = 8 (x + 4)

    12 - 2x = 8x + 32

    12 - 32 = 8x + 2x

    -20 = 10x

    x = - 20/10

    x = - 2
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