Question 408941
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Hi
twice as many dimes as quarters.  There are 140 coins in all
Let x, 2x and (140-3x) represent the number of quarters, dimes and nickels respectively
Question states***CENTS makes sense
 25x + 10*2x + 5(140-3x) = 1000 CENTS
Solving for x
     30x = 300
       x = 10, number of quarters.   20 dimes and 110 nickels

CHECKING our Answer***
 25*10 + 10*20 + 5*110 = 250 + 200 + 550 = 1000 OR $10.00