Question

Amanda has $227 worth of bills in her purse. She has 6 more $5 bills than $10 bills. The number of $1 bills is three fewer than 25 times the number of $10 bills. How many bills of each kind does Amanda have?

Answer 1

Count the bills, and count the values.
# of tens: x
# of fives: x+6
# of ones: 25x-3
so,
10x + 5(x+6) + 1(25x-3) = 227
now do your magic.

Answer 2

# of tens: 5
# of fives: 11
# of ones: 122

Answer 3

thanks oobleck