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Shya works part-time at a gift-wrapping. the store sells wrapping paper rolls and package of wrapping rolls. there are a total of 125 rolls and package. each roll costs $3.50 and each package costs $2.25. the total of all of the rolls and package is $347.50 . how many rolls of wrapping paper are there?

Answer :

texaschic101
r + p = 125.....p = 125 - r
3.5r + 2.25p = 347.50

3.5r + 2.25(125 - r) = 347.50
3.5r + 281.25 - 2.25r = 347.50
3.5r - 2.25r = 347.50 - 281.25
1.25r = 66.25
r = 66.25 / 1.25
r = 53 <== there are 53 rolls of wrapping paper (r)

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