Question 623728
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Hi,  
a vending machine contains dimes and {{{highlight(x)}}}quarters. 
There are 339 coins all together totalling $54.15.
Question states***CENTS make sense
 25x + 10(339-x)= 5415¢
      15x = 2025¢
        x = 135 Quarters and 204 Dimes
and
CHECKING our Answer***
{{{25*135 + 10*204}}} = 3375¢ + 2040¢ = 5415¢ or $54.15