need help with word problem

Algebra
Tutor: None Selected Time limit: 1 Day

Wade has a test score of 77% on his first test and 65% on his second test. What must he score on a third test to have an average of 80% overall?
93% None of the choices are correct. 98% 89%
May 18th, 2015

(77+65+x)/3 =80

77+65+x = 80*3

142 +x = 240

x = 240 -142

   = 98

Please let me know if you have any questions and best me if you are satisfactory.



May 18th, 2015

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May 18th, 2015
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