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

Algebra ->  Problems-with-consecutive-odd-even-integers -> SOLUTION: A store sells 3 boxes of toothpicks for 87 cents. What would the store charge for 10 boxes?      Log On


   

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


Hi,         

Let x represent the charge for 10 boxes

Question sets up the Proportion

+3%2F.87+=++10+%2Fx

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