A corner store sells two kinds of baked goods: cakes and pies. A cake costs $5 and a pie costs $7. In one day, the store sold 15 baked goods for a total of $91. How many cakes did they sell?
A. 7 cakes

B. 4 cakes

C. 8 cakes

D. 5 cakes

Question

A corner store sells two kinds of baked goods: cakes and pies. A cake costs $5 and a pie costs $7. In one day, the store sold 15 baked goods for a total of $91. How many cakes did they sell? 
 A. 7 cakes  
 
 B. 4 cakes  
 
 C. 8 cakes  
 
 D. 5 cakes

anonymous · Answer

http://answers.yahoo.com/question/index?qid=20120509131431AAGoaeo

anonymous · Answer

can you give me the answer ? it wouldnt show

anonymous · Answer

5x+7y=91
x+y=15

solve for y in x+y=15
and plug that into y in 5x+7y=91
and solve for x

anonymous · Answer

how do you solve for x

anonymous · Answer

have you done the first two steps? (solve for y and plug it into the other equation?)