Question 157310: A collecton of 197 coins consists of nickels, dimes, and quarters. The number if dimes is 2 more than one-third the number of nickels, and the number of quarters is three times the number of dimes. How many dimes are there?
I did some work but I cant figure it out
D+N+Q=197
D=1/3N+2
Q=3D: A collecton of 197 coins consists of nickels, dimes, and quarters. The number if dimes is 2 more than one-third the number of nickels, and the number of quarters is three times the number of dimes. How many dimes are there?
I did some work but I cant figure it out
D+N+Q=197
D=1/3N+2
Q=3D
Answer by josmiceli(2035)  (Show Source):
You can put this solution on YOUR website!(1) 
(2) 
(3) 
-----------------
(1) and (3) substitution
(4) 
-----------------
(2)
substitute this in (4)
There are 29 dimes
---------------
check:
(3)
---------------
OK
|