Question 465250
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Hi,
Let x amd (25-x)represent the number of dimes and nickels respectively
Question states***CENTS makes sense
 10x + 5(25-x) = 150
Solving for x
      5x =25
       x = 5, number of dimes.  20 Nickels.  (25-5)
CHECKING our Answer***
  5*10 + 5 *20 = 150 or $1.50