Question
Xavier went to a boutique with 4 ten-dollar notes. He bought a bag and a mug. A bag cost 2 times as much as a mug. He received $36.40 change. How much did the mug cost?
4 m

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Xavier went to a boutique with 4 ten-dollar notes. He bought a bag and a mug. A bag cost 2 times as much as a mug. He received $36.40 change. How much did the mug cost?