[tex]\it \ Frac\c{\it t}ia\ dat\breve a\ are\ forma\ \ \dfrac{x}{9x}\\ \\ \dfrac{x+10}{9x-8}=\dfrac{1}{2} \Rightarrow \dfrac{9x-8}{x+10}=2 \Rightarrow 9x-8=2\cdot(x+10) \Rightarrow 9x-8=2x+20 \Rightarrow \\ \\ \\ \Rightarrow 9x-2x=20+8 \Rightarrow 7x=28|_{:7} \Rightarrow x=4\\ \\ Frac\c{\it t}ia\ cerut\breve a\ este\ \ \dfrac{4}{9\cdot4}=\dfrac{4}{36}[/tex]
