👤
a fost răspuns

9:3*{2+6*[6-2:(7-5*a)]-2}=2700:30

Răspuns :

3*{2+6*[6-2:(7-5a)]-2}=90
{2+6*[6-2:(7-5a)]-2}=90:3
2+6*[6-2:(7-5a)]=30+2
6*[6-2:(7-5a)]=32-2
6-2:(7-5a)=30:6
-2:(7-5a)=5-6
-2:(7-5a)= -1
7-5a=1*2
-5a=2-7
-5a=-5
a=5:5
a=1
9:3x{2+6x[6-2:(7-5xa)]-2}=2700:30
3x{2+6x[6-2:(7-5xa)]-2}=90
2+6x[6-2:(7-5xa)]-2=90:3
2+6x[6-2:(7-5xa)]-2=30
2-2+6x[6-2:(7-5xa)]=30
6x[6-2:(7-5xa)]=30
6-2:(7-5xa)=30:6
6-2:(7-5xa)=6-5
2:(7-5xa)=1
(7-5xa)=2:1
7-5xa=2
5xa=7-2
5xa=5
a=5:5
a=1

Alte intrebari