Mathematics, 05.09.2019 04:30 xarianna2007

Lucas purchased 4 large posters and 6 small posters online and spent $21 on shipping. he spent x to ship each small poster and twice as much to ship each large poster. what is the cost of shipping a small poster? explain your thinking.

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Lucas purchased 4 large posters and 6 small posters online and spent $21 on shipping. he spent x to...