[tex]15x - 5 = 3x \\ 15x -3x =5 \\ 12x = 5 \\ x = \frac{5}{12} [/tex]
[tex]x = \frac{1}{2} + \frac{5}{4} \\ x = \frac{7}{4} [/tex]
sper ca te am ajutat !
