SOLUTION: If the numers are 93,84,86,and 75 what number would you add to raise the mean to 86?"

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Question 897554: If the numers are 93,84,86,and 75 what number would you add to raise the mean to 86?"
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be that unknown number.

We have this set of numbers: 93,84,86,75,x

We want the mean of them to be equal to 86, so (93+84+86+75+x)/5 = 86. Notice how I added up all the numbers and divided by 5 (there are 5 numbers in the set 93,84,86,75,x)

Solve for x to get... 

	(93+84+86+75+x)/5 = 86

	93+84+86+75+x = 5*86

	93+84+86+75+x = 430

	338+x = 430

	x = 430-338

	x = 92

So the answer is 92