1. Building and Solving Equations Slideshow 23, Mathematics Mr Richard Sasaki Room 307

2. Objectives Practice building simple equations based on worded examplesPractice building simple equations based on worded examples Understand how one unknown can be used for two circumstances that relateUnderstand how one unknown can be used for two circumstances that relate

3. Building Equations We built a few simple equations in Chapter 2. Let’s try building some more. Example What did we assume? Both chocolate bars have the same value.

4. Building Equations Let’s try another example. Example Here we assumed… Both bottles cost the same amount.

5. Answers The cans of cola are the same price. Both drinks cost the same amount. The rice cookers are the same price. Both prizes have the same value. Each option has the same value and the chocolates and bottles of wine cost the same amount.

6. Two Unknowns? How do we deal with two variables / unknowns that directly effect one another? Example AppleOrange

7. Two Unknowns? Let’s try another. Example So…

8. Two Unknowns? Let’s try a harder question. Example Therefore, the total cost of the bananas is. So, the total cost of the oranges is. Total cost:

9. Answers - Easy

10. Answers - Hard