Răspuns :
[tex] \bf\dfrac{x - 1}{3} = 4[/tex]
[tex] \bf x - 1 = 3 \cdot4[/tex]
[tex] \bf x - 1 = 12[/tex]
[tex] \bf x = 12 + 1[/tex]
[tex] \boxed{\bf x = 13}[/tex]
[tex] \bf\dfrac{x - 1}{3} = 4[/tex]
[tex] \bf x - 1 = 3 \cdot4[/tex]
[tex] \bf x - 1 = 12[/tex]
[tex] \bf x = 12 + 1[/tex]
[tex] \boxed{\bf x = 13}[/tex]