Problema Solution
Mary has $51.00 in ones and fives. She has a total of 23 bills. How many of each kind of bill does she have?
Answer provided by our tutors
let x=ones and y=fives
so x+y=23 ATQ
and
x+5y=51
subtract both equations,we get
4y=28 so y=7(bills of fives)
x=23-7=16(bills of ones)