Mark has twice as many quarters as nickels and three more dimes than nickels. He has 4.20 in all. How many of each type of coin does he have?
1 answer:
Answer:
Number of nickels = 6
number of dimes = 9
number of quarters =12
Step-by-step explanation:
Let 'q' be the number of quarters and 'n' be the number of nickels
and 'd' be the number of dimes
twice as many quarters as nickels
three more dimes than nickels.
1 nickel = 5 cents
1 dime = 10 cents
1 quarter = 25 cents
4.20 dollars = 420 cents
replace q and d in the above equation
Subtract 30 from both sides
divide both sides by 65
n=6
Number of nickels = 6
number of dimes =
number of quarters =
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