mathe

x+x+1/5*x+2/15 = 

5/5*x+5/5*x+1/5*x+2/15 = 

(5/5+5/5+1/5)*x+2/15 = 

11/5*x+2/15

$x +x +\frac{1}{5}\cdot x+\frac{2}{15}=\color{blue}2\frac{1}{5}x+\frac{2}{15}$

  !