math
posted by Ron .
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?
A 6 dozen
B 7 dozen
C 8 dozen
D 9 dozen
Let X be the number of dozen roses.
17X is the number of dozen carnations.
15 X + 8(17X) = 192
7 X = 192  136 = 56
Solve that for X

45