1. 3.4 3x3 Word Problems
Algebra 2 Standard 2.0

2. Warm Ups

3. Key Concept-Elimination Method
Step1: Identify the variables.
Step2: Set up the three equations system using the variables.
Step3: Solve the system, and check your solutions. Write the answers in complete sentence form.

4. Example 1
The sum of three numbers is 14.  The largest is 4 times the smallest, while
the sum of the smallest and twice the largest is 18.  Find the numbers.

5. Step1: Define the variables Step2: Write the systems using the variables.

6. Step 3: Solve the system.

8. Example 2
Tasty Bakery sells three kinds of muffins: chocolate chip muffins at 40 cents each, oatmeal muffins at 45 cents each, and cranberry muffins at 50 cents each. Charles buys some of each kind and chooses three times as many cranberry muffins as chocolate chip muffins. If he spends $7.95 on 17 muffins, how many chocolate chip muffins did he buy?

9. Step1: Define the variables Step2: Write the systems using the variables.

10. Step 3: Solve the system.

12. Homework #30
3x3 Word problem WS.