Question 1010510
Call their prices, r and c.  Then we have
8r + 9c = 335  (work in cents) and
12r + 5c = 375
Now multiply the top one by 3 and the bottom by 2 and subtract them...we get...
24r + 27c = 1005
-(24r + 10c = 750)
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17c = 255
c = 15 cents per carnation
so that
8r + 9(15) = 335
8r + 135 = 335
8r = 200
r = 25 cents per rose