Răspuns :
{30+10x[207-6x(28+28:7)]}:10-1=
={30+10x[207-6x(28+4)]}:10-1=
=[30+10x(207-6x32)]:10-1=
=(30+10x15):10-1=
=180:10-1=
=17
Sper ca ti-am fost de ajutor!
{30+10x[207-6x(28+4)]} :10
[30+10x(207-6x32)] :10
(30+10x15):10
180:10
18
[30+10x(207-6x32)] :10
(30+10x15):10
180:10
18