[tex] \frac{1}{4} [/tex] *x+[tex] \frac{1}{3} [/tex]*x -5=2 /+5
[tex] \frac{1}{4} [/tex] *x+[tex] \frac{1}{3} [/tex]*x=7
[tex] \frac{x}{4} + \frac{x}{3} [/tex]=7
amplificam prima fractie cu 3; iar pe a doua cu 4
[tex] \frac{3x}{12} + \frac{4x}{12} =7
[tex] \frac{7x}{12} [/tex]=7
7x=12*7 /:7
x=12
