Question 467597
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Hi,
same number of pennies and nickels, number of dimes is 5 more than the number of nickels
Let x represent the number of pennies and nickels 
and (x+5)represent the number of dimes
Question states***CENTS makes sense
 x + 5x + 10(x+5) = 290 CENTS
Solving for x
       16x = 240
         x = 15, number of pennies and the number of nickels.  
                there were 20 Dimes   (15+5)

CHECKING our Answer***
  15 + 5*15 + 200 = 290 CENTS OR $2.90