1. October 12, 2015 Warm-Up:Warm-Up:

2. Homework Worksheet 4.3T

3. Objective Write down the objective in your math journal in your own words. SWBAT solve two-step algebraic equations.

4. Step 1If you do not have an equation mat, draw one like the one seen below on a blank sheet of paper. Step 2On your equation mat, place a variable cube on one side with 3 negative integer chips. On the other side of the mat, place 5 positive integer chips. This represents the equation 2x + 2 = 8.

5. With your group, decide how to evaluate what x is equal to by adding or removing chips. ** You must add or remove the same amount from both sides!

7. Good to Know! You can solve equations using inverse operations to keep your equation balanced. Inverse operations are operations that undo each other, such as addition and subtraction.

8. Example 2 Solve the equation for the variable. Check the solution. Write the equation. Subtract 2 from both sides of the equation. Multiply each side by 7.  Check the solution. x = –56 –2

9. Example 3 Solve the equation for x. Check the solution. 12 – 5 x = 2 Rewrite the equation by adding the opposite. Subtract 12 from both sides. Divide each side by (–5).  Check the solution x = 2 12 + (–5x) = 2 –12 –5x = –10 x = 2 12 – 5(2) = 2 12 – 10 = 2 2 = 2 –5