1. 3/1/2016 Algebra Ms. Narczewski
Solving Equations
3/1/2016
Algebra
Ms. Narczewski

2. Vocab
Equation: A mathematical statement with an equal sign and at least one variable.
Examples:
1) X – 12 = ) 3r + t = 34
Solution: A number or set of numbers that make an equation true.

3. In other words: Isolate the variable.
Solving an Equation
Goal: When solving an equation, the goal is to get the variable alone on one side of the equal sign.
In other words: Isolate the variable.
Rules:
1) Terms can move across the equal sign using
inverse operations

4. Addition Subtraction Multiplication Division
Inverse Operations: The opposite operation to “undo” another
Addition
Subtraction
Multiplication
Division

5. Solving Equations Rules
1) Terms can move across the equal sign using
inverse operations
2) What you do to one side, you must also do to the other.
Think of it as a scale, to keep a scale even (equal) you need to do the same to each =

6. Negative Variables: To completely solve an equation, you must have the variable alone AND POSITIVE. To undo a negative variable, DIVIDE BOTH SIDES BY -1