SOLUTION: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85?

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Question 517970: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(71+83+96+x)/4=85
250+x=85*4
250+x=340
x=340-250
x=90