Răspuns:
(2/5-12/5-1/6):[0,2(3)*10/7+1/2]
=(-10/5-1/6):[((23-2)/90)*10/7+1/2]
=(-2-1/6):(21/90*10/7+1/2)=
=(-12/6-1/6):(3/9*1+1/2)=
= -13/6:(1/3+1/2)=
=-13/6:(2/6+3/6)=
= -13/6:5/6 = -13/6*6/5 = -13/5
Explicație pas cu pas: