Răspuns:
3.
[tex] \frac{x}{3} = \frac{6}{19} = > x = \frac{6 \times 3}{19} = > x = \frac{18}{19} = > x = [/tex]
4.
[tex]4x = 8 = > x = \frac{8}{4} = > x = 2[/tex]
