SOLUTION: A store sells 3 boxes of toothpicks for 87 cents. What would the store charge for 10 boxes?

Question 381669: A store sells 3 boxes of toothpicks for 87 cents. What would the store charge for 10 boxes?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!



Hi,         

Let x represent the charge for 10 boxes

Question sets up the Proportion



Cross multiply to solve for x

 3x  = 10*.87

   x = 10*.87/3

   x = $2.90



CHECKING our Answer

  3/.87 = 1/.29 = 10/2.90  = 1/.29 

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