SOLUTION: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Chris lost 90 points. How many bull's eyes did he have?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Chris lost 90 points. How many bull's eyes did he have?      Log On


   

Question 76531: At an amusement park you get 5 points for each bull's eye you hit, but you lose 10 points for every miss. After 30 tries, Chris lost 90 points. How many bull's eyes did he have?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let b=number of bullseyes...so 30-b is the number of misses...5b-10(30-b)=-90...or 15b-300=-90

so 15b=210 and b=14