Question 131035
C+R=17 OR C=17-R
15R+8C=192. NOW REPLACE C WITH (17-R) & SOLVE FOR R
15R+8(17-R)=192
15R+136-8R=192
7R=192-136
7R=56
R=56/7
R=8 DOZEN ROSES WERE BOUGHT.
17-8=9 DOZEN CARNATIONS WERE BOUGHT.
PROOF:
15*8+8*9=192
120+72=192
192=192