Taking it One Step at a Taking it One Step at a Time….Time….

Solving One-Step Equations using Solving One-Step Equations using the Variable X.the Variable X.

Step One:Step One:

Directions: Solve for X. X + 2 = 5Directions: Solve for X. X + 2 = 5

Q: First ask yourself….what kind of math Q: First ask yourself….what kind of math do I see…. Addition, subtraction, do I see…. Addition, subtraction, multiplication, or division? multiplication, or division?

A: AdditionA: Addition

Step Two:Step Two:

Q: Now ask yourself….what is the Q: Now ask yourself….what is the opposite of addition? opposite of addition?

A: SubtractionA: Subtraction

You will use subtraction to solve for X.You will use subtraction to solve for X.

Step Three:Step Three:

Q: Who moves through subtraction in Q: Who moves through subtraction in

X + 2 = 5? X + 2 = 5?

What makes sense?What makes sense?

Move X or 2?Move X or 2?

A: Move 2 so you can solve for X. A: Move 2 so you can solve for X.

Reminder: To solve for X, you must get X Reminder: To solve for X, you must get X by itself. Therefore moving 2 makes by itself. Therefore moving 2 makes sense.sense.

Step Four:Step Four:

Solve for X. Use Subtraction and move 2. Solve for X. Use Subtraction and move 2.

5 minus 2 equals 3. 5 minus 2 equals 3.

X = 3X = 3

Example:Example:

X + 2 = 5X + 2 = 5

-2 -2-2 -2

X =X = 33

Solution:Solution:

Solve for X. X + 2 = 5Solve for X. X + 2 = 5

X =X = 33

Your Turn:Your Turn:

Directions: Solve for X. Directions: Solve for X. X + 3 = 5X + 3 = 5

You may go back and look at each slide. You may go back and look at each slide. Your work needs to be clear and follow Your work needs to be clear and follow proper technique as illustrated in Step proper technique as illustrated in Step Four. Please turn in your problem to get Four. Please turn in your problem to get credit for this exercise. credit for this exercise. Don’t forget your name and the date!! Don’t forget your name and the date!!