Question 515594
Another problem to break into parts and analyze. Using logic, we know she has 3x the amount of nickels and she does quarters. So, lets create a formula to help us solve our problem by trial and error.

(N x $.05)+ (D x $.1) + (Q x $.25) = $2.00

Now lets plug in numbers, remember d and q are equal, and N is 3x larger than them. To start, I'll use D=5 Q=5 N=15.

(15 x $.05) + (5 x $.1) + (5 x $.25) = $2.50

Nope too high. Lets continue plugging in numbers. N=12, D=4, Q=4

(12 x $.05) + (4 x $.1) + (4 x $.25) = $2.00

So there is your answer. She has 12 nickels, 4 dimes, and 4 quarters.


Hope this helped, all the best.
-mucklef