<PRE><B>Question 1135261</B>
(88 +72 +82 +2x)/5 = 80
:
multiply both sides of = by 5 and simplify
:
242 +2x = 400
:
2x = 158
:
x = 79
:
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final exam score of 79 or greater will give a final average of at least 80%
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