SOLUTION: Marco has 150 coins, all nickels and dimes. He has 12 more dimes than nickels. How many nickels and dimes does he have? Let n be the number of nickels and d be the number of d

Algebra ->  Systems-of-equations -> SOLUTION: Marco has 150 coins, all nickels and dimes. He has 12 more dimes than nickels. How many nickels and dimes does he have? Let n be the number of nickels and d be the number of d      Log On


   

Question 264340: Marco has 150 coins, all nickels and dimes. He has 12 more dimes than nickels. How many nickels and dimes does he have?

Let n be the number of nickels and d be the number of dimes. Write an equation that shows that the sum of the number of nickels and the number of dimes is 150.
Answer by mananth(16946) About Me  (Show Source):
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Marco has 150 coins, all nickels and dimes. He has 12 more dimes than nickels. How many nickels and dimes does he have?

Let n be the number of nickels and d be the number of dimes. Write an equation that shows that the sum of the number of nickels and the number of dimes is 150.
Let the number of nickels be x
no of dimes = x+12
2x+12=150
2x=150-12
x=150-12 / 2
=69 nickels
dimes = 81