SOLUTION: Christine went shopping and bought each of her ten nephews a gift, either a video costing 14.95 or a CD costing 16.88. She spent 166.87 on the gifts. How many videos and how many C

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Question 891376: Christine went shopping and bought each of her ten nephews a gift, either a video costing 14.95 or a CD costing 16.88. She spent 166.87 on the gifts. How many videos and how many CDs did she buy?
Answer by josgarithmetic(39623)   (Show Source): You can put this solution on YOUR website!
x for videos
y for CD's

Ten nephews means ten gifts, so x+y=10. That accounts for number of gifts.

14.95x+16.88y=166.87 accounts for the cost of the ten gifts.

;



Multiply both sides by -1.


; and the value for y is obvious.

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