Stefi's Two Step Algebratic Equation Solving!

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Hello guys, my name is Stefi and today I will be showing you how to do two-step equation solving. 

Here is an example question:

4y-9=15

4 is the coefficient
y is the variable
9 is the constant
15 is the answer

The first thing you have to do is isolate the constant, by doing that you have to do the opposite signs. So if it is -9 you have to do +9 and vise-versa. You have to do it to both sides of the equal sign to keep the equation balanced.

4y-9+9=15+9

Since you isolated the constant you now have to solve the equation, so negative 9 plus 9 is zero. So you are now left with 4y on the left hand side. Now you solve the right hand side, so 15+9 is 24. Now write it all down.

4y-9+9=15+9
4y=24

Now to isolate the variable you have to divide both sides by the coefficient, in this case it is 4. So divide both sides by 4. 
4y=24
4      4
So now you are left with just the variable and the answer.
y=6


    

Congratulations! you did REAL grade 8, 2 step equation solving. IF you still didn't understand watch this video on how to do it!!! 


https://www.youtube.com/watch?v=9ITsXICV2u0

Homework: "Books Never Written" in your algebra book #3. :)




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9 comments:

  1. Great job Stefi, very descriptive!

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  2. Terrific job Stefi, great use of colour and nice examples! Good job!1

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  3. Great Scribe Post Stefi. I really love your use of colour. It makes the post 100% better. It also is very pleasing to the eye. I like how you simplified the question and took it apart step by step. You explained the steps of how to do the two step algebraic questions very clearly.

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  4. Nice scribe post stefi. I really like how it's colourful and it very neat and organized. Good job !

    ReplyDelete
  5. Nice scribe post stefi. I really like how it's colourful and it very neat and organized. Good job !

    ReplyDelete
  6. Good job Stefi,I like how you made things bright and colourful.

    ReplyDelete