# Lili Coffin, Period 11

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2(2x-4)=10

#### Storyboard Text

• It's cold! We need some winter clothes!
• Look! There's a store where we can get some clothes! We get \$4 off each set too!
• THE SNOW STORE
• Today only! \$4 off each set of hats and scarves!
• Hmmm...these hats and scarves don't show how much they cost on the scanner, but it shows me my total. I should make an equation...I've got it! The equation is 2(2x-4)=10.
• THE SNOW STORE
• Today only! \$4 off each set of hats and scarves!
• Let's see...our first step in solving this equation is to change the subtraction to addition, so it would then be 2(2x+-4)=10. The next thing we have to do is distribute the 2 to everything in the parentheses, so now it is 4x+-8=10.
• THE SNOW STORE
• Today only! \$4 off each set of hats and scarves!
• After distributing, we can change the +-8 to -8. Now we have 4x-8=10. The next step is to use the addition property of equality, and add 8 to 10, giving us 4x=18. We then have to use the division property of equality, so we divided 18 by four, which gives us x=4.5. Each set cost \$4.50.
• THE SNOW STORE
• Today only! \$4 off each set of hats and scarves!
• Yay! Let's go explore Antarctica!
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