((x + [tex] \frac{x}{5} [/tex]) - [tex] \frac{x}{2} [/tex])5
= ((x + [tex] \frac{5x + x}{5} [/tex]) - [tex] \frac{x}{2} [/tex])5
= (x + [tex] \frac{6x}{5} [/tex] - [tex] \frac{x}{2} [/tex])5
= (x + [tex] \frac{12x - 5x}{10} [/tex]) 5
= (x + [tex] \frac{7x}{10} [/tex]) 5
= x + [tex] \frac{7x}{2} [/tex]
= 3,5x