Problema Solution
Lori went to the bank to cash a check for $420. She wanted all $10 and $20 bills. She received 27 bills. How many of each did she receive?
Answer provided by our tutors
let
x = the number of $10 bills
y = the number of $20 bills
She received 27 bills
x + y = 27
Lori went to the bank to cash a check for $420
10x + 20y = 420
by solving the system of equations
x + y = 27
10x + 20y = 420
we find
x = 12 bills
y = 15 bills
click here to see the step by step solution of the system of equations
Lori received 12 bills of $10 and 15 bills of $20.