Problema Solution
Bob's coin bank contains nickels, dimes, and quarters. There are twice as many dimes as quarters, and seven more nickels than dimes. The total value of the coins is $3.10. How many of each coin are there?
Answer provided by our tutors
Nickel:2x+7
Dime:2x
Quarter: x
So the equation is
0.05(2x+7)+0.1*2x+0.25*x = 3.1
x=5
So
Nickel:17
Dime: 10
Quarter: 5