Răspunsuri

2014-11-02T13:13:54+02:00
 \frac{2x}{3}+ \frac{x}{4} =99 (amplificam la prima cu 4, iar al a doua cu 3)  ⇒ \frac{8x+3x }{12} =99 \frac{11x}{12} =99⇒ x= \frac{99*11}{12}