SOLUTION: A student in an algebra course has test scores of 73, 87, 71, and 85. What score on the next test will raise the student's average to 81?

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Question 988635: A student in an algebra course has test scores of 73, 87, 71, and 85. What score on the next test will raise the student's average to 81?
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

%2873%2B+87%2B+71%2B+85%2Bx%29%2F5=81
73%2B+87%2B+71%2B+85%2Bx=81%2A5
316%2Bx=405
x=405-316
x=89-score on the next test