Posted by Emily on .
Find the solution if possible. If there is not enough information to solve the problem or if it has no solution, say so. If extra information is given, identify it.
14. A collection of 30 coins worth $5.50 consists of nickels, dimes, and quarters. There are twice as many dimes as nickels. How many quarters are there?

I'm pretty sure there's enough information to solve this problem, I just can't figure it out. I either get fractions or negative numbers as my answer. Any help is greatly appreciated!! :)

Algebra II 
bobpursley,
Q+D+N=30
.25Q+.10D +.05N=5.50
D=2N
Yes, three equations, three unknowns, enought information. 
Algebra II 
Emily,
Ah, ok you made everything a lot simpler. Thanks!! :)

Algebra II 
cyiesha,
A collection of 30 coins worth $5.50 consists of nickels, dimes, and quarters. There are twice as many dimes as nickels. How many quarters are there?