A student has some $1 and $5 bills in his wallet. He has a total of 15 bills that are worth $55. How many of each type of bill does he have?
The student has ? $1 bills and ? $5 bills
count the bills and the amounts:
x+y = 15
x+5y = 55
The student has ? $1 bills and ? $5 bills
x+y = 15
x+5y = 55