You can put this solution on YOUR website! Maria has twice as many quarters as dimes if she has 7.00 dollars how many of each type of coin does she have ?
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Number of dimes: d
Number of quarters: 2d
25(2d) + 10(d) = 700 (in cents)
60d = 700
d = 700/60 = 11.66667
There seems to be a mistake/omission in the problem statement. She can not have a fractional number of dimes and quarters.
( If she had $7.20 then the problem would have an integer solution (d=12, 2d=24) )
