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    Algerbra's Avatar
    Algerbra Posts: 1, Reputation: 1
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    #1

    Nov 20, 2007, 05:11 PM
    Algerbra 1
    Rewrite the equation so that y is a function of x
    -3x+y=8
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
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    #2

    Nov 20, 2007, 05:14 PM
    Quote Originally Posted by Algerbra
    Rewrite the equation so that y is a function of x
    -3x+y=8
    Show us what you've gotten... or where you got lost on this one.

    https://www.askmehelpdesk.com/math-s...board-b-u.html
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    awesome5 Posts: 1, Reputation: 1
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    #3

    Nov 29, 2007, 04:57 PM
    Quote Originally Posted by Algerbra
    Rewrite the equation so that y is a function of x
    -3x+y=8
    Im in honors math Algebra 1... the answer is f(x)=-3x - 8 I think
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    cool_dude Posts: 124, Reputation: 9
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    #4

    Nov 30, 2007, 03:48 PM
    Quote Originally Posted by awesome5
    Im in honors math Algebra 1....the answer is f(x)=-3x - 8 i think
    Something looks wrong there. I don't want to embarrass myself here because your majoring in math from what you said but I believe that your answer is wrong and it should be f(x) = 8 + 3x. Can anyone confirm?
    pytrik's Avatar
    pytrik Posts: 1, Reputation: 1
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    #5

    Dec 2, 2007, 06:49 AM
    To prevent confusion here the right answer is indeed y=8+3x (or f(x)=8+3x, whichever you prefer).
    To find this solution you do the following:
    -3x+y=8
    add 3x on each side of the equation
    y=8+3x
    that already is the answer, I don't see any reason to rewrite it as f(x).
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
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    #6

    Dec 2, 2007, 08:33 AM
    Quote Originally Posted by pytrik
    To prevent confusion here the right answer is indeed y=8+3x (or f(x)=8+3x, whichever you prefer).
    To find this solution you do the following:
    -3x+y=8
    add 3x on each side of the equation
    y=8+3x
    that already is the answer, I don't see any reason to rewrite it as f(x).
    Yes that is the answer I said. I was pretty sure I was right but again awesome5 said he is doing his honours in math so that's why I wanted someone to confirm my answer. Also I guess when you do a lot of math you will start writing y as f(x). They're both the same so it really doesn't matter its just the way you prefer.
    jolinchen's Avatar
    jolinchen Posts: 2, Reputation: 1
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    #7

    Dec 3, 2007, 09:48 AM
    Quote Originally Posted by Algerbra
    Rewrite the equation so that y is a function of x
    -3x+y=8
    you have -3x+y=8
    you just write y= first and then -3x got transfer after the = sign so it becomes 3x since 8 is already after = you don't need to change the sign
    the answer is y=3x+8
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
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    #8

    Dec 3, 2007, 12:11 PM
    Quote Originally Posted by jolinchen
    you have -3x+y=8
    you just write y= first and then -3x got transfer after the = sign so it becomes 3x since 8 is already after = you don't need to change the sign
    the answer is y=3x+8
    And how is that different from what I and pytrik said?
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