Problema Solution
in a group of nickles and dimes worth 6.80,the ratio of the number of nickles to the number of dimes is 3 to 7.find the number of dimes
Answer provided by our tutors
Nickel = 5 cents = x
Dime = 10 cents = y
5x + 10y = 680
x/y = 3/7
y = 7x/3
15x + 70x = 2040
85x = 2040
x = 24
120+10y = 680
10y = 540
y = 54