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

Question 424034: Marco had 150 coins,all nickels and dimes. He has 12 more dimes than nickels. How many nickels and how many dimes does he have ?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of dimes
Let = number of nickels
given:
(1)
(2)
------------------------
Substitute (2) into (1)
(1)
(1)
(1)

and, since
(2)

He has 81 dimes and 69 nickels

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