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John and Doug each have a paper route. John has 7 times as many newspapers to deliver as Doug. After Doug took some of John's papers, each boy had 40 papers to deliver. How many newspapers did Doug take?

 May 12, 2021
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j = 7d     given

     let 's' = papers taken from j

j - s   = 40         j= 40 + s

d + s = 40         d = 40 -s       sub these into the original equation

 

40+s = 7 (40-s)

s = 30 papers

 May 13, 2021

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