One month Michael rented
9
movies and
7
video games for a total of
$56
. The next month he rented
3
movies and
5
video games for a total of
$34
. Find the rental cost for each movie and each video game.
If you know what's good for you, STAY AWAY from that woman's RIDICULOUS solution!
This is how this is DONE!
Let cost of a movie and a video be M, and V, respectively
Then we get: 9M + 7V = 56 ------ eq (i)
Also, 3M + 5V = 34 ------- eq (ii)
9M + 15V = 102 ------- Multiplying eq (ii) by 3 ----- eq (iii)
8V = 46 ------ Subtracting eq (i) from eq (iii)
Cost to rent a video, or
3M + 5(5.75) = 34 ------ Substituting 5.75 for V in eq (ii)
3M + 28.75 = 34
3M = 34 - 28.75
3M = 5.25
Cost to rent a movie, or