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What is the value of x in the following equation? -3x-2=2x+8

According to the data set, where should the upper quartile line of the box plot be placed?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?