Question 1157529
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Let d be the number of dimes.

Then the number of quarters is 2d, according to the condition.


Then we can write the money equation for the total in the form


    10d + 25*(2d) = 15000   cents,  or

    10d + 50d = 15000,

    60d       = 15000

      d       = 15000/60 = 250.


<U>ANSWER</U>.  250 dimes and 2*250 = 500 quarters.


<U>CHECK</U>.   250*10 + 500*25 = 15000 cents.    ! Precisely correct !
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Solved.