Mathematics, 25.07.2019 08:10 savyblue1724707
an online store sells two types of speaker docks for smartphones. the higher-priced speaker dock sells for $170 and the lower-priced speaker dock sells for $90. last week the store sold three times as many lower-priced speaker docks as higher-priced speaker docks. combined sales totaled $3,080. how many lower-priced speaker docks did it sell?
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