How do you simplify (x/3) + (5x)/(3)?

$\left(\frac{x}{3}\right) + \frac{5 x}{3} = 2 x$
$\left(\frac{x}{3}\right) + \frac{5 x}{3} = \frac{x + 5 x}{3} = \frac{6 x}{3} = 2 x$