73. BUYING Suppose that you have a $129 credit on your account
at Amazon.com, and you want to spend it all on sale CDs at $10
cach, sale DVDs at $12 each, and sale books at $7 each. If you buy
13 items total, how many will you buy of each?
Answers
Answered by
0
buy of each in different cases CD = 1 DVD = 7 Books = 5 or CD = 6 DVD = 4 Books = 3 or CD = 11 DVD = 1 Books = 1
Step-by-step explanation:
Let say CD bought = C
Amount spends on CD = 10C
Let say DVD bought = D
Amount spends on DVD = 12D
Let say Book Bought = B
Amount spend on Book = 7B
C + D + B = 13
10C + 12D + 7B = 129
10 C + 12D + 7(13 - C - D) = 129
=> 3C + 5D = 38
using Hit & Trial
C = 1 D = 7 B = 5
C = 6 D = 4 B = 3
C = 11 D = 1 B = 1
Learn more:
Positive integers x, y, z satisfy xy +z = 160. Compute the smallest ...
https://brainly.in/question/11759571
a Chief steward spent $2,820 on buying goose and ducks if each ...
https://brainly.in/question/13757204
Similar questions