Cindy wants to paint her office. She can buy three cans of the same-priced paint and three identical brushes for $21, or she can buy four cans of the same paint and one brush for $22. How much does a can of paint cost?
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Set up a system of equations. Let x = the price of a can of paint and y = the price of a brush. Then: 3x + 3y = 21 4x + y = 22 Does this make sense?
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