SOLUTION: Eight scores have an average of six. Scores of 15 and x increase the average to 7. Find x.

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Question 928088: Eight scores have an average of six. Scores of 15 and x increase the average to 7. Find x.
Answer by 428225(90) About Me  (Show Source):
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8*6 = 48 (mean * amount numbers)
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Now add 15 and x to this number
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(48+15+x)/(10)=7
63+x=70
x=7