# How much does a binder cost?

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#### Storyboard Text

• Three friends, Matt, Erin, and Sam, are shopping for school supplies.
• My name is Matt. I am buying 3 notebooks, 3 packs of pencils, and 1 binder. My total is \$49.50.
• My name is Sam. I am buying 3 notebooks, 3 packs of pencils, and 1 binder. My total is \$38.50.
• My name is Erin. I'm buying 3 notebooks, 2 packs of pencils and 4 binders. My total is \$57.50.
• They need to know how much it cost for one of the binders.
• To find the price of one binder, the three need to set up equations.
• My equation is 3n + 2p + 4b = \$57.75
• My equation is 3n + 3p + b = \$38.50
• My equation is 2n + 4p + 2b = \$49.50
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