A collection of nickels, dimes, and quarters totals $8.20. The number of nickels and dimes
together is twice the number of quarters. The value of the nickels is one-third the value of the
dimes. How many of each kind of coin are there?

Question

A collection of nickels, dimes, and quarters totals $8.20.  The number of nickels and dimes 
together is twice the number of quarters.  The value of the nickels is one-third the value of the 
dimes.  How many of each kind of coin are there?

alexwee123 · Answer

are you having trouble making the equations?

anonymous · Answer

yes

alexwee123 · Answer

so n= nickels, d= dimes and q= quarters  
0.05n + 0.1d + 0.25q = 8.20 
n+d=2q 
n/3 = d

pfenn1 · Answer

@alexwee123, the Value of the nickels is one third the value of the dimes
0.05n=(1/3)0.10d
  I think

alexwee123 · Answer

ya i noticed :/

alexwee123 · Answer

forgot about the value part :/

pfenn1 · Answer

$$0.05 n =\left(  0.10d \over 3 \right)$$