SOLUTION: DVDs cost $12 and CDs cost $10. Chris bought 9 items and spent $104. Write a system of linear equations that can be used to find how many DVDs (d) and how many CDs (c) Chris boug

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: DVDs cost $12 and CDs cost $10. Chris bought 9 items and spent $104. Write a system of linear equations that can be used to find how many DVDs (d) and how many CDs (c) Chris boug      Log On


   

Question 1146179: DVDs cost $12 and CDs cost $10. Chris bought 9 items and spent $104. Write a
system of linear equations that can be used to find how many DVDs (d) and how
many CDs (c) Chris bought. How many DVDs did Chris buy?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
d+c=9
12d+10c=104
12d+12c=108
12d+10c=104
2c=4
c=2 CD's
d=7 DVD's
check
12*7+10*2=104
84+20=104
104=104
ok