SOLUTION: A student scored 65,86,and 98 on three algebra test. What must he score on the fourth test in order to have an average grade of at least 85?

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Question 565516: A student scored 65,86,and 98 on three algebra test. What must he score on the fourth test in order to have an average grade of at least 85?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
65 + 86 + 98 + x = 4 * 85