How much does a binder cost?
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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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