Question

va rog ajutor :) ex 2

Answer 1

(2×5+4)/5×[(2×10+7)/10×20/63-14/15÷(1×25+3)/25]=
14/5×(27/10×20/63-14/15÷28/25)=
14/15×(3/1×2/7-14/15×25/28)=
14/15×(6/7-1/3×5/2)=
14/15×(6/7-5/6)=
14/15×(6×6/42-5×7/42)=
14/15×(36-35/42)=
14/15×1/42=
2/15×6=
2/90=
1/45