SOLUTION: A vending machine will accept nickels and dimes only. The attendant checks the machine and finds 42 coins whose value is $3.40. How many coins of each type were there?

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Question 151577: A vending machine will accept nickels and dimes only. The attendant checks the machine and finds 42 coins whose value is $3.40. How many coins of each type were there?
Answer by jojo14344(1513)   (Show Source): You can put this solution on YOUR website!
Let

so, , right? ----------------> eqn 1
Also, ------------> eqn 2
in eqn we get, , substitute in eqn 2 we have,



-----------> , # of dimes
For # of nickels go back eqn 1:
, , # of nickels
In doubt? Go back eqn 2;



Thank you,
Jojo
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