Question

Find x if the mean of the numbers 13,2x,0,5x and 11 is 9

Answer 1

x can't be found because the question you asked has no equation

Answer 2

Answer:

$mean = \frac{13 + 2x + 0 + 5x + 11}{5} = 9 \\ \frac{24 + 7x}{5} = 9 \\ 24 + 7x = 45 \\ 7x = 45 - 24 \\ 7x = 21 \\ x = 3$

Hope it helps. ☺️