Question 597325: Rosa has $3.10 in nickels and dimes. she has 10 less nickels than she has dimes. how many dimes and nickels does she have Found 2 solutions by solver91311, josmiceli:Answer by solver91311(24713) (Show Source):
Let represent the number of dimes and then has to be the number of nickels. Dimes are worth 10 cents each, so the total value of the dimes must be cents. Likewise, nickels are worth 5 cents so the total value of the nickels is .
All together the dimes and nickels are worth $3.10, which is the same thing as 310 cents, hence:
Solve for , then calculate .
John
My calculator said it, I believe it, that settles it
You can put this solution on YOUR website! Let = number of nickels
Let = number of dimes
given:
(1)
(2) ( in cents )
--------------------------
Substitute (1) into (2)
(2)
(2)
(2)
(2)
(2)
and, since
(1)
(1)
(1)
She has 14 nickels and 24 dimes
check:
(2)
(2)
(2)
(2)
OK
