Verified Answer :

alexak

8 + 6 + 9 + 12 + 4x / 5  =  x                      Original Problem.
25 + 4x / 5 = x                                         Addition.
25 + 4x = 5x                                            Multiply each side by 5.
25 = x                                                      Subtract 4x from each side.
x = 25                                                      Switch equation around.

Answer: x = 25

Answer:

35

Step-by-step explanation:

The average of 8,6,9,12 and 4x is x

To get average add all the numbers given in data set and divide by 5 because we have 5 numbers in data set

Average =\(\frac{8+6+9+12+4x}{5}\)

Given that average is x. So we replace x for average

\(x=\frac{8+6+9+12+4x}{5}\)

Multiply both sides by 5

\(5x= 8+6+9+12+4x\)

Subtract 4x from both sides

\(x= 8+6+9+12\)

\(x=35\)

So the value of x is 35

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