Question 508292
We will set up a system of equations.

Let V = number of videos bought
Let C = number of CDs bought

We know that there are nine nephews in total, so since every nephew got either a video or CD, then the number of videos + number of CDs is also 9.

So   V + C = 9.

We also know the cost of each video and CD and how much was spent.

So   14.95V +  16.88C  = 140.34


Let's try substitution method here.

Doesn't matter which variable we solve for, so let's just solve for V.

V  = 9 - C

So where you see V in the second equation, sub in "9-C"

14.95(9-C) + 16.88C = 140.34

134.55 - 14.95C + 16.88C = 140.34

1.93C = 5.79

C = 3

Sub C = 3 back into either original equation, though I think I know which one you'd find is easier.


V + 3 = 9

V = 6

So we bought 6 videos and 3 CDs. <---- Answer


I hope this helped!

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