Răspuns :
[tex] \frac{x}{2} + \frac{x}{4} = 28.35 \: | \times 8[/tex]
[tex]4x + 2x = 226.8[/tex]
[tex]6x = 226.8[/tex]
[tex]x = \frac{226.8}{6} [/tex]
[tex]x = 37.8[/tex]
[tex]4x + 2x = 226.8[/tex]
[tex]6x = 226.8[/tex]
[tex]x = \frac{226.8}{6} [/tex]
[tex]x = 37.8[/tex]