Barbara sells iced tea for 1 point 4 9 dollars per bottle and water for 1 point 2 5 dollars per bottle. She wrote an equation to find the number of bottles she needs to sell to earn 100 dollars 1 point 2 5 x plus 1 point 4 9 is equal to 100 What error did Barbara make in writing the equation?

The equation uses 1.25x to represent the money from x bottles of water, but it adds only 1.49 for iced tea, as if Barbara sold just one bottle of iced tea. To account for the number of bottles of iced tea, its price must also be multiplied by that number. So the error is that her equation did not consider the number of bottles of iced tea.

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