## Saturday, March 16, 2013

### Vina's Algebra Unproject

#### eg.)  2x + 1= 9

2 Step Multiplication:

4x + 3=23

First you isolate the variable

4x + 3 - 3=23 - 3

Then you cancel the constant by using zero pairs

4x = 20
4       4

Next you divide both sides by it's coefficient.

x= 5

Now that you know what x is, you verify.

4x + 3=23
Always write the equation.

4(5) + 3=23
Replace the x with 5.

20 + 3=23
Next I did 4(5) which is 20.

23=23

You always write that in the end when you verify.

Here's a link you could go to about 2 step multiply equations.

2 Step Division:

+ 5=8
2

First you isolate the variable by using a zero pair

x + 5 -5=8 -5
2

Next you multiply the variable and do the same thing on the other side.
(2)x  = 3(2)
2

x=6
Now you verify it.
Always remember to write the equation down.

x + 5 = 8
2

Now substitute the x with the 6.

6 + 5= 8
2

Divide the coefficient.

3+5=8
Then you verify it by adding it.

8=8
That's how you vertify

Distributive property:

2 (x -1) = 6
First  you multiply the constant with the variable by it's coefficient.

2 (x-1) =6
x-1
Then you will have:
2x - 2 =6
Next you solve it just like the 2 step multiply
2x -2 =6
2x -2 +2 =6+2
2x = 8
2       2
x=4

2x -2 =6
2(4) -2=6
8 -2 =6
6=6