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Kristin spent $131 on shirts. fancy shirts cost $28 and plain shirts cost $15. if she brought a total of 7 then how many of each kind did she buy?

 Mar 16, 2020
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f = fancy                  total cost  28 f

(7-f) = p = plain       total cost of plains 15 (7-f)      summed, the costs are 131

 

28f      +     15 (7-f)      = 131      solve for f, the number of fancy shirts..... then plains  =     7-f

 Mar 16, 2020

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