Question 360949
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Hi, 
Let x represent the number of dimes.  Then the number of quarters is (x+6)
10x + 25(x+6) = 605 cents
solve for x
35x + 150 = 605
35x = 455
x = 13
13 dimes and (13+6) Or 19 quarters
checking our answer
10*13 + 25*19 = 130 + 475 = 605cents