Wednesday, October 14, 2009

hw #3-2 Solving Equations with Variables on Both Sides!!

For info on solving equations on both sides

See the Video Tutor: http://www.phschool.com/atschool/academy123/html/bbapplet_wl-problem-430890.html

or see Purplemath: http://www.purplemath.com/modules/solvelin2.htm
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6 comments:

  1. Jamie ViottoOctober 14, 2009 at 8:58 PM

    Were we supposed to use the reason banks and recheck or answers?

    ReplyDelete
  2. Mr. ChamberlainOctober 14, 2009 at 9:20 PM

    Yup! You don't have to use the "special paper" but you DO NEED TO provide a REASON for EVERY STEP and CHECK YOUR ANSWERS!!

    ReplyDelete
  3. AnonymousOctober 15, 2009 at 5:18 PM

    is there a property that we need to put if we change subtraction to addition by having the opposite value?
    i.e 4-2 into 4+(-2)
    -Kevin

    ReplyDelete
  4. Mr. ChamberlainOctober 15, 2009 at 5:28 PM

    Excellent question! Yes, you MUST ALWAYS provide a reason... in this case, we will let this one fall into the general category of "Simplify/Add the opposite" (you can just write "Simplify"), since the math gods allow us to re-write subtraction as addition by simply adding the opposite. The same goes for changing addition-to-subtraction, mult-to-div and div-to-mult (of course the mult/div switche-rooskies are due to reciprocals, not opposites, but it's the same basic concept).

    And yes, we need to get "switche-roosky" on the Word Wall.

    Mr. C.

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  5. cHaRmIOctober 15, 2009 at 8:03 PM

    so for every step we need a reason?

    ReplyDelete
  6. Mr. ChamberlainOctober 15, 2009 at 8:16 PM

    Yup! When you're solving, that is. For the CHECK steps (DON'T FORGET THE CHECK STEPS!!!!!), just do the math step-by-step... you are simplifying as you go, so you don't need to write that each time.

    ReplyDelete

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