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Homework Help: Quick: Just a SIMPLE question on Linear equation.

  1. Sep 23, 2010 #1
    **Quick: Just a SIMPLE question on Linear equation.

    1. The problem statement, all variables and given/known data

    Ok,

    5x + 2(30) = y

    turns into:

    5/3x + 20 = y (that is 5 over 3 x)

    Now it says something I dont understand.

    "We now have two equations:

    y = 5/3x + 20 and y = x + 30 (How did it get y = x + 30???)



    2. Relevant equations



    3. The attempt at a solution

    Thanks, appreciate it!
     
  2. jcsd
  3. Sep 23, 2010 #2

    rock.freak667

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    Homework Helper

    Re: **Quick: Just a SIMPLE question on Linear equation.

    I don't understand this, your book went from a linear line to a non-linear line?
     
  4. Sep 24, 2010 #3

    HallsofIvy

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    Science Advisor

    Re: **Quick: Just a SIMPLE question on Linear equation.

    Perhaps you mean (5/3)x+ 20= y but even that is wrong. Dividing 5x+ 2(30)= y through by 3 gives (5/3)x+ 20= (1/3)y.

    Presumably y= x +30 is given by some other condition before what you have quoted.



     
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