SOLUTION: A collection of nickels and dimes makes $1.75. How many of each coin are there if there are twice as many dimes as nickels?

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Question 1188346: A collection of nickels and dimes makes $1.75. How many of each coin are there if there are twice as many dimes as nickels?
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
Instead of doing your homework for you, I'll do another one exactly like it step
by step.
A collection of nickels and dimes makes $2.10. How many of each
coin are there if there are three times as many dimes as nickels?
0.05N + 0.10D = 2.10
            D = 3N

Substitute 3N for D in 0.05N + 0.10D = 2.10

0.05N + 0.10(3N) = 2.10
   0.05N + 0.30N = 2.10
           0.35N = 2.10
               N = 2.10/0.35
               N = 6

Substitute 6 for N in D = 3N

D = 3(6)
D = 18

Answer: 6 nickels and 18 dimes

Now do yours the exact same way.

Edwin
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