Question 903064
x the number of Quarters
CENTS make Sense
25x + 10(x-2) + 5(4x) = 640
 55x = 660
 x = 12Quarters.  10Dimes{{{12-2}}} and 48Nickels {{{4*12}}}
And
300 + 100 + 240 = 640  0r $6.40