Find the mean of x, x + 2, x + 4, x + 6, x + 8.

Numbers are x, x + 2, x + 4, x + 6, x + 8.

$\therefore$ Mean $=\frac{\text { Sum of numbers }}{\text { Total numbers }}$

$=\frac{x+x+2+x+4+x+6+x+8}{5}$

$=\frac{5 x+20}{5}$

$=5\left(\frac{x+4}{5}\right)$

= x + 4