Question

For a wedding, Shereda bought several dozen
roses and several dozen carnations. The roses
cost $15 per dozen, and the carnations cost $8
per dozen. Shereda bought a total of 17 dozen
flowers and paid a total of $192. How many
roses did she buy?

Answer 1

15r + 8c = 192
r + c = 17 ---> c = 17 - r

Now just sub 17 - r in for c in the second equation and solve for r (roses).

Answer 2

Thank you this really helped out!