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Alison walked 7x kilometers from her house to library. she then walked 4x kilometers from the library to her school. What was the total distance Alison walked?

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Vanae;
One way....
(7x+4x) kilometers=11x kilometers
Round trip...
[2(7x+4x)] kilometers=[2(11x)] kilometers=22x kilometers