Răspuns:
[tex]\frac{43}{45}[/tex]
Rezolvare:
[tex]a)\:1\frac{4}{5}:(\frac{3}{4}\times\frac{8}{21}+1)-\frac{4}{9}=\\[/tex]
[tex]=\frac{9}{5}:(\frac{2}{7}+1)-\frac{4}{9}=\\[/tex]
[tex]=\frac{9}{5}:\frac{9}{7}-\frac{4}{9}=\\[/tex]
[tex]= \frac{9}{5}\times\frac{7}{9}-\frac{4}{9}=\\[/tex]
[tex]=\frac{7}{5}-\frac{4}{9}=\\[/tex]
[tex]=\bf\boxed{ \frac{43}{45} }\\[/tex]
Succes! ❀
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