SOLUTION: How many ways can I make .70 cents out of nickels and dimes only using only 11 coins only?

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Question 1184655: How many ways can I make .70 cents out of nickels and dimes only using only 11 coins only?
Found 2 solutions by greenestamps, Alan3354:
Answer by greenestamps(13200) (Show Source):
You can put this solution on YOUR website!

x = # of nickels
11-x = # of dimes

The total value is 70 cents:

Solve using basic algebra; I leave that to you.

You can solve the problem without formal algebra by examining different possible combinations of 11 dimes and nickels:

11 nickels and 0 dimes: 55 cents
10 nickels and 1 dime: 60 cents
....

It should be clear that only one combination of 11 dimes and nickels will have a total value of 70 cents.

ANSWER: 1 combination of 11 dimes and nickels has a total value of 70 cents

Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
How many ways can I make .70 cents out of nickels and dimes only using only 11 coins only?
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.70 cents is not 70 cents.
You can't make .70 cents with those coins.