Question

$Rezolvati exercitiul : (1- \frac{2}{5} *1 \frac{1}{4}+3:1 \frac{1}{5}):[( \frac{13}{5}-2 \frac{1}{3}* \frac{6}{7})*1 \frac{3}{7}]$

Answer 1

(1-2/5·5/4+3·5/6):((13/5-7/3·6/7)·10/3)=(1-1/2+5/2):((13/5-2)·10/7)=
(1-6/2):((2$\frac{3}{5}$-2)·10/7)=
(1-3):(3/5·10/7)=
-2:6/7=-2·7/6=-7/3