Problema Solution
muriel has $3.70 in dimes and quarters. if there are 25 coins in all, how many of them are dimes?
Answer provided by our tutors
let
x = the number of dimes
y = the number of quarters
there are 25 coins in all
x + y = 25
1 dime = $0.1
1 quarter = $0.25
the total of money Muriel has is $3.70
0.1x + 0.25y = 3.70
by solving the system of equations
x + y = 25
0.1x + 0.25y = 3.70
we find
x = 17 dimes
y = 8 quarters
Muriel has 17 dimes.