Mr. Singh deposited $170 in his bank. The number of $5 bills was three times the number of $10 bills and the number of one dollar bills was 30 more than the number of five dollar bills how many bills of each type did he deposit

Answer 1

X = The # of $10 bills.
3X = the # of $5. bills.
3x+30 = The # of $1 bills.

10x + 5*3x + 1*(3x+30) = 170
10x + 15x + 3x + 30 = 170
28x = 140
X = 5-$10 bills.
3x = 3*5 = 15-$5 bills.
3x+30 = 3*5 + 30 = 45-$1 bills.