Question 392764
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Hi
five fewer dimes than nickels
Let x and (x+5) represent the numer of dimes and nickels respectively
Question states***(makes sense to use cents)
 10x + 5(x+5) = 400 CENTS
solving for x
 15x + 25 = 400
     15x = 375
       x = 25, the number of dimes.  The number of nickels is 30.   (25+5)

CHECKING our Answer
  250 + 150 = 400cents or $4.00