Question 925793
x the number of Nickels
25(3x) + 10(x+5) + 5x = 320
90x = 320 - 50
90x = 270
x = 3, the number of Nickels.  9 Quarters and 8 Dimes {{{3+5}}}
and Checking
225 + 80 + 15 = 320