Răspuns:
0,(2)=2/9
2/9/x=4/9
2/9x=4/9
18=36x
x=18÷36=1/2
[tex]\it\dfrac{ 0,(2)}{x}=\dfrac{4}{9} \Rightarrow x=\dfrac{9\cdot0.(2)}{4}=\dfrac{\not9\cdot\dfrac{2}{\not9}}{4}=\dfrac{\ 2^{(2}}{4}=\dfrac{1}{2}[/tex]
