1. 2.1 Solving One Step Equations
Objective: Solve equations using addition and subtraction.
Discuss:
2 = 2. What if I add 3 to both sides?

2. 2.1 Solving One Step Equations
Remember: Adding or subtracting ANY number to BOTH Sides does not change the equation.
Remember: ADDING undoes SUBTRACTION
Remember: SUBTRACTING undoes ADDITION

3. 2.1 Solving One Step Equations
SIMPLIFY: Combine like terms and/or distribute on the left and right if NEEDED.
SORT: variables on one side, numbers on the other
SOLVE: isolate the variable, must be a single POSITIVE variable.

4. 2.1 Solving One Step Equations
GOAL: ISOLATE the variable.
That means get it by itself on one side with numbers and/or other variables on the other side.
To do this, follow the GOLDEN RULE of Equation Solving
Whatever I do unto one side of the equals sign; do unto the other.

5. Practice with Examples
Example 1: Solve x + 13 = 27
Always Check The Solution with Substitution!

6. Practice with Examples
Example 2: Solve - 7 = b - 37
Always Check The Solution with Substitution!

7. Practice with Examples
Example 3: Solve 4x= 6.4
Always Check The Solution with Substitution!

8. Practice with Examples

9. Practice with Examples

10. Practice with Examples
Example 6: p. 84 in book
Always Check The Solution with Substitution!

11. Section 2.1 Homework
Homework P – 48 even.