SOLUTION: In a carnival game, you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Duy lost 90 points. How many bull's eyes did he have?

SOLUTION: In a carnival game, you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Duy lost 90 points. How many bull's eyes did he have?

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Question 1013367: In a carnival game, you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Duy lost 90 points. How many bull's eyes did he have?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call x the number of bull's eyes he got...thus he had 30-x misses...then we write
5x - 10(30-x) = -90
5x - 300 + 10x = -90
15x = 210
x = 14 bull's eyes
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