Math

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I still can't understand this one.In class we got 42 but I got 48 and when I check it none of them match up

4/8y-21=3 What is y?

  • Math -

    Assuming you copied the problem correctly, your answer is correct.

    4/8y-21=3

    4/8y = 3 + 21

    4/8y = 24

    y = 24 / (4/8)

    y = 24 * (8/4)

    y = 192/4 = 48

    Proof:
    1/2 (48) - 21 = 3
    24 - 21 = 3

  • Math -

    If you mean
    (4/8)y - 21 = 3
    then y=48 as you got.
    If the question were
    (4/8)y-21=0
    then y=42

  • Math -

    Thank you!

  • Math -

    You're welcome.

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