Question

if the mean of the number 7,8,x,11 and 14 is x, find x​

Answer 1

Answer:

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Step-by-step explanation:

Arithmetic mean =$\frac{7+8+x+11+14}{5}$

x = $\frac{40+x}{5}$

5x = 40+x

4x = 40

x = 10

Answer: 10

Answer 2

We have

7+8+x+11+14÷5 =x

⇒ 40+x=5x

⇒ x=10