### Scribe Post for Feb.11,2009

6:11 PM

Today in math class we checked the test we did yesterday and I am going to show how to solve 2 of the given problems.

9m=3m-48

The fist thing to do is to move the variable to the left sides.

I subtracted both sides of the equation by -3m to cancel the variable on the right side.Remember that what you did to the right side, you must do it to the left side and vice-versa.

We have to get rid of multiplication, so we have to divide both sides of the equation by the numerical coefficient 6. Again remember that what you did to the left side, you must do it to the right side.

1. copy the given equation
9m = 3m - 48
2. substitute the answer (-8) to m
9(-8) = 3 (-8) -48
3. solve
-72= -72

The next one I am going to solve is a word problem.

5. You bought a pen for \$5 and 4 erasers. You spent a total \$25. How much did each eraser cost?

First we have to represent the cost of each eraser by n

Let n = cost of each eraser

4n + 5 = 25 translate words into equations

4n + 5 = 25 simplify the equation by subtracting both sides of the

-5 = -5 equation by 5

_______________

4n/4 = 20/4 divide both sides of the equation by 4

n = 5 ~~~~~ the cost of each eraser

to check the answer, write the equation

4n + 5 =25

substitute n by the answer which is 5

4(5) + 5 = 25

20 + 5 = 25

25 = 25

For the next scribe I pick CHRISTIAN...

#### 6 Responses to "Scribe Post for Feb.11,2009"

February 11, 2009 at 11:39 PM
Good job Lance!!! Nice scribe, you've explained it very well and I also like your pictures, it was big and clear..again Good job!! :)
February 12, 2009 at 12:46 PM
nice! Lance(amazing lacap) your work was very organized very clear images nice!
February 13, 2009 at 10:27 AM
Great job Lance! I like your scribe. It was very understandable. I like how you used big fonts and colour. But I think you shouldn't use more then one colour in one word because it can be confusing. Great job again.
February 16, 2009 at 3:30 PM
Good job Lance! It is explained well. Good use of colours too. :)
February 17, 2009 at 12:33 PM
Good job Lance! I liked the big fonts that you used, but you have some capitalization errors, and other than that it was great!!
February 18, 2009 at 6:57 PM
Good job Any, Nice use of color, It's also big and Clear pictures
VVEEEERRRRRRRYYYYYY GGGGGOOOOOODDD!!