SOLUTION: Dave scores 6,9 and 11 on his exams what does he need to get an average of 10 on his next exam

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Question 1007959: Dave scores 6,9 and 11 on his exams what does he need to get an average of 10 on his next exam
Answer by Edwin McCravy(20066) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = the score he gets on his next exam:

Then set the average of the 4 scores 6,9,11 and x equal to 10

%286%2B9%2B11%2Bx%29%2F4%22%22=%22%2210

Simplify and solve for x

Edwin