Concept explainers
To determine the number of coins of each person.
Answer to Problem 18P
Natalie had
Dirk had
Quincy had
Explanation of Solution
Given:
Natalie has some nickels; Dirk has some dimes and Quincy has some quarters.
Dirk has five more dimes than Quincy has quarters.
If Natalie gives Dirk a nickel, Dirk gives Quincy a dime and Quincy gives Natalie a quarter, they will have the same amount of money.
Calculation:
Let,
Quincy has x quarters.
Then, Dirk has
And let, Natalie has
If Natalie gives Dirk a nickel, Dirk gives Quincy a dime and Quincy gives Natalie a quarter, they will have the same amount of money.
So, after giveaway,
Quincy has x - 1 quarters and 1 dime; These worth
Dirk has 1 nickel and
Natalie has
According to the problem,
Taking first two parts:
Now taking the last two parts:
Conclusion:
Therefore, Natalie had 13 nickels, Dirk had 9 dimes and Quincy had 4 quarters.
Chapter 3 Solutions
Algebra: Structure And Method, Book 1
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