(88+92+97+96+x)/5 = 90
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To find the average of a set of test scores we divide the sum of the test scores by the number of test scores. On her first four algebra tests,Paula wests scored 88,92,97,and 96. Write an equation that can be used to determine the grade paula needs to obtain on her fifth test to have a 90 average. Solve the equation determine the score.
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