**Variable: The unknown, using a letter to represent the number.**

Constant: The integer in an algebraic expression or equation.

*You have to make a zero pair

Algebra: Writing mathematical phrases using letters to represent numbers

**Eg. 9x -7 = -7**

Solving Addition/Subtraction One Step Equations:

1. Isolate the variable

2. Cancel using the opposite

- Create a zero pair for the constant

3. Balance on the other side of the equal sign

4. Verify your answer

1. Isolate the variable

2. Cancel using the opposite

- Create a zero pair for the constant

3. Balance on the other side of the equal sign

4. Verify your answer

**3 + p = 8**

3 - 3 + p = 8 - 3

p = 5

3 + p = 5

3 + 5 = 8

8 = 8

**x - 7 = 13**

x - 7 + 7 = 13 + 7

x= 20

x - 7 = 13

20 - 7 = 13

13 = 13

Solving Addition/Subtraction One Step Equations Using Algebraic Tiles:

1. Isolate the variable

2. Cancel the constant using a zero pair

3. Balance

4. Verify

1. Isolate the variable

2. Cancel the constant using a zero pair

3. Balance

4. Verify

1. Isolate the variable

2. Cancel the constant

3. Balance

4. Simplify the variable

5. Balance

6. Verify**Solving Two Step Equations:**1. Isolate the variable

2. Cancel the constant

3. Balance

4. Simplify the variable

5. Balance

6. Verify

**3x + 8 = 11**

3x + 8 - 8 = 11 - 8

3x = 9

3x/ 3 = 3/3

x = 1

3x + 8 = 11

3 (1) + 8 = 11

3 + 8 = 11

11 = 11

Also here is a video:

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