Question 1004878
Call the numbers of $10 bills and $50 bills, x and y.
Then x + y = 160 and the value equation is
10x + 50y = 1760
Now multiply the first equation by 10 and subtract from the second...
10x + 50y = 1760
-(10x + 10y = 1600)
and get
40y = 160
y = 4 $50 bills