Question 11016
define:
let number of 5cents be y
let number of 10cents be x


0.05y + 0.10x = 5.35 --> NOTE: all monies HAVE to be in the same units. Either everything in cents or everything in dollars.


also, y = 7 + x/2
--> 2y = 14 + x
--> 2y - x = 14
--> 0.2y - 0.1x = 1.4


So, we have:
0.05y + 0.1x = 5.35
0.2y - 0.1x = 1.4


You solve these.
Answers are x=40, y=27


jon.