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The set $\{5, 8, 10, 18, 19, 28, 30, x\}$ has eight members. The mean of the set's members is 4.5 less than $x$. What is the value of $x$ ?

 Mar 28, 2020
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The mean of the set is all the numbers added up divided by the total number of terms.

There are 8 terms and 118+x is the sum.

So (118+x)/8 is the mean, which is 4.5 less than x, or x-4.5

Our equation is \(\frac{118+x}{8}=x-4.5\).

I believe you can solve this.

 

You are very welcome!

:P

 Mar 28, 2020

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