SOLUTION: If Sarah got 79% 69% 73% and 84% what would she have to get on her fifth test to get an average of at least 80 %

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: If Sarah got 79% 69% 73% and 84% what would she have to get on her fifth test to get an average of at least 80 %      Log On


   

Question 1081241: If Sarah got 79% 69% 73% and 84% what would she have to get on her fifth test to get an average of at least 80 %
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
(79+69+73+84+x)/5 = 80
multiply both sides times 5. On the left 5 multiplying and 5 dividing cancel each other:
79+69+73+84+x = 400
305+x = 400
subtract 305 from both sides:
x = 95
Looks like Sarah has a lot o work to do!