<PRE><B>Question 986131</B>
let x be no of ten dollar bills 
let y be no of five dollar bills 
let z be no of one dollar bills 
  x+y+z = 135
   x=25+y
put x=25+y in above equation
   25+y+y+z=135
    25+2y+z=135
2y+z=110...........eq(1)
sum  = $776
 x*10+y*5+z=776
put x=25+y in the above equation
  (25+y)*10+5y+z=776
   250+10y+5y+z=776
    15y+z=776-250
    15y+z=526........eq(2) 
solve equation 1 and 2
    subtract eq 1 from eq 2
   15y+z-(2y+z)=526-110
     13y =416
     y= 416/13
       y=32
     x= 25+32
        = 57
but x+y+z=135
   57+32+z=135
     89+z=135
              z=46
no of on ten dollar bills  (x)=57
no of on five dollar bills  (y)=32
no of one dollar bills (z)=46</PRE>